2023年排放差距報告-英

Broken

RecordTemperatureshitnewhighs,yetworldfailsto

cutemissions(again)EmissionsGapReport2023Emissions

Gap

Report

2023:Broken

Record?

2023

United

Nations

Environment

ProgrammeISBN:978-92-807-4098-1Job

number:DOI:DEW/2589/NA/10.59117/20.500.11822/43922This

publication

may

be

reproduced

in

whole

or

in

part

and

in

any

form

for

educational

or

non-pro?t

services

withoutspecial

permission

from

the

copyright

holder,

provided

acknowledgement

of

the

source

is

made.

The

United

NationsEnvironment

Programme

would

appreciate

receiving

a

copy

of

any

publication

that

uses

this

publication

as

a

source.

Nouse

of

this

publication

may

bemade

for

resale

or

any

other

commercial

purpose

whatsoever

without

prior

permissionin

writing

from

the

United

Nations

Environment

Programme.

Applications

for

such

permission,

with

a

statement

ofthepurpose

and

extent

of

the

reproduction,

should

be

addressed

to

unep-communication-director@.DisclaimersThe

designations

employed

and

the

presentation

of

the

material

in

this

publication

do

not

imply

the

expression

of

anyopinion

whatsoever

on

the

part

of

the

Secretariat

of

the

United

Nations

concerning

the

legal

status

of

any

country,territory

or

city

or

area

or

its

authorities,

or

concerning

the

delimitation

of

its

frontiers

or

boundaries.Mention

of

a

commercial

company

or

product

in

this

document

does

not

imply

endorsement

by

the

United

NationsEnvironment

Programme

or

the

authors.

The

use

of

information

from

this

document

for

publicity

or

advertising

is

notpermitted.

Trademark

names

and

symbols

are

used

in

an

editorial

fashion

with

no

intention

on

infringement

of

trademarkor

copyright

laws.The

views

expressed

in

this

publicationare

those

of

theauthors

and

do

not

necessarily

re?ect

theviews

of

theUnitedNations

Environment

Programme.We

regret

any

errors

or

omissions

that

may

have

been

unwittingly

made.?

Maps,

photos,

and

illustrations

as

speci?edSuggested

citationUnited

Nations

Environment

Programme

(2023).

Emissions

Gap

Report

2023:

Broken

Record

–

Temperatures

hit

newhighs,

yet

world

fails

to

cut

emissions

(again).

Nairobi.

/10.59117/20.500.11822/43922.Production:URL:Nairobi/emissions-gap-report-2023Co-produced

with:Supported

by:Broken

RecordTemperatures

hit

new

highs,yet

world

fails

to

cutemissions(again)Emissions

Gap

Report2023Emissions

Gap

Report

2023:Broken

RecordAcknowledgementsThe

United

Nations

Environment

Programme

(UNEP)

would

Contributing

authors:

Jesse

Burton

(University

of

Cape

Townlike

to

thank

the

members

of

the

steering

committee,

the

lead

and

E3G,

South

Africa),IoannisDafnomilis(PBL

Netherlandsand

contributing

authors,

the

reviewers

and

the

Secretariat

Environmental

Assessment

Agency,

the

Netherlands),

Ipekfor

their

contribution

to

the

preparation

of

this

assessment

Gen?sü

(ODI,

United

Kingdom),

Archie

Gilmour

(ODI,

Unitedreport.

Authors

andreviewers

have

contributedto

thereport

Kingdom),

Mariana

Gutiérrez

Grados

(Climate

Transparency,in

their

individual

capacities.

Their

affiliations

are

only

Germany),

Frederic

Hans

(NewClimate

Institute,

Germany),mentionedforidenti?cation

purposes.Sarah

Heck

(Climate

Analytics,

Germany),

Niklas

H?hne(NewClimate

Institute,

Germany),

Camilla

Hyslop

(OxfordUniversity,

United

Kingdom),

Anna

Kanduth

(Canadian

ClimateSteeringcommitteeMuna

Alamoodi

(Ministry

of

Climate

Change

and

Environment,

Institute,

Canada),

Ben

King

(Rhodium

Group,

United

StatesUnited

ArabEmirates),

Juliane

Berger

(German

Environment

of

America),

Hannah

Kolus

(Rhodium

Group,

United

StatesAgency),

Ruta

Bubniene

(Secretariat

of

the

United

Nations

of

America),

Ho-Mi

Lee

(Korea

Energy

Economics

Institute,FrameworkConvention

on

ClimateChange

[UNFCCC]);

John

Republic

of

Korea),

Jared

Lewis

(Climate

Resource,

Australia),Christensen

(UNEP

Copenhagen

Climate

Centre

[UNEP-

Swithin

Lui

(NewClimate

Institute,

Germany),

Natasha

LutzCCC]),

María

Paz

Cigaran

(Libélula);

Navroz

K.

Dubash

(Centre

(Oxford

University,

United

Kingdom),

Andrew

Marquardfor

Policy

Research),

Simon

Evans

(Carbon

Brief)

(steering

(University

of

Cape

Town,

South

Africa),

Silke

Mooldijkcommittee

observer),JianLiu

(UNEP),

Gerd

Leipold(Climate

(NewClimate

Institute,

Germany),

Leonardo

NascimentoTransparency)

(steering

committee

observer),

Simon

(NewClimate

Institute,

Germany),

Analuz

Presbítero

(IniciativaMaxwell

(independent),

Shonali

Pachauri

(International

Climática

de

México

[ICM],

Mexico),

Jazmín

Rocco

PredassiInstituteforApplied

Systems

Analysis

[IIASA]);

Dan

Plechaty

(Farn,

Argentina),

Joeri

Rogelj

(Imperial

College

London,(ClimateWorksFoundation),KatiaSimeonova

(independent),

United

Kingdom;

International

Institute

for

Applied

SystemsYouba

Sokona

(Intergovernmental

Panel

on

Climate

Change

Analysis

[IIASA],

Austria),

Clea

Schumer

(World

Resources[IPCC]),

Oksana

Tarasova

(World

Meteorological

Organization)

Institute,

United

States

of

America),

Alister

Self

(Climateand

Iman

Ustadi

(O?ce

ofthe

UAE

Special

Envoyfor

Climate

Resource,

Australia),

Kentaro

Tamura

(Institute

for

GlobalChange,UnitedArabEmirates)Environmental

Strategies

[IGES],

Japan)

and

Jorge

Villarreal(ICM,Mexico)AuthorsData

contributors:

Johannes

Gütschow

(Potsdam

Institute

forClimate

Impact

Research,

Germany),

Christopher

HendersonChapter1Authors:

Anne

Olhoff

(CONCITO

–

Denmark’s

green

think

(World

Resources

Institute,

United

States

of

America),

Elenatank,

Denmark)

and

John

Christensen

(UNEP-CCC,

Denmark)

Hooijschuur

(PBL

Netherlands

Environmental

AssessmentAgency,

the

Netherlands),

Kimon

Keramidas

(EuropeanChapter2Commission,

JRC,Spain),

Mia

Moisio

(NewClimate

Institute,Lead

authors:

William

F.

Lamb

(Mercator

Research

Institute

Germany),

Mika

P?üger

(Climate

Resource,

Germany)

andon

Global

Commons

and

Climate

Change,

Germany;

University

ClaireStockwell(ClimateAnalytics,Germany)of

Leeds,

United

Kingdom

of

Great

Britain

and

NorthernChapter4Ireland)

andMinalPathak(AhmedabadUniversity,India)Leadauthors:

JoeriRogelj

(Imperial

College

London,

UnitedContributing

authors:Lucas

Chancel

(World

Inequality

Lab,

Kingdom;

IIASA,

Austria),

Michel

den

Elzen

(PBL

NetherlandsParis

School

of

Economics,

France),

Monica

Crippa

(European

Environmental

Assessment

Agency,

the

Netherlands)

andCommission,

Joint

Research

Centre

[JRC],

Italy),

Giacomo

Joana

Portugal-Pereira

(Graduate

School

of

EngineeringGrassi

(European

Commission,

JRC,

Italy),

Diego

Guizzardi

[COPPE],

Universidade

Federal

do

Rio

deJaneiro,Brazil)(European

Commission,

JRC,

Italy),

Jing

Meng

(UniversityCollege

London,

United

Kingdom),

Glen

P.

Peters

(CICERO

Contributing

authors:

Taryn

Fransen

(World

ResourcesCenter

forInternational

ClimateResearch,

Norway)

and

Julia

Institute,

United

States

of

America),

Jarmo

Kikstra

(ImperialPongratz

(Ludwig-Maximilians

University

Munich,Germany)College

London,

United

Kingdom),

Robin

Lamboll

(ImperialCollege

London,

United

Kingdom),

Malte

Meinshausen(University

of

Melbourne,

Australia)

and

Isabela

SchmidtChapter3Lead

authors:

Takeshi

Kuramochi

(NewClimate

Institute,

Tagomori

(PBL

Netherlands

Environmental

AssessmentGermany),

Michel

den

Elzen

(PBL

Netherlands

Environmental

Agency,theNetherlands)Assessment

Agency,

the

Netherlands)

and

Taryn

Fransen(World

ResourcesInstitute,UnitedStatesofAmerica)Data

contributors:

Ioannis

Dafnomilis

(PBL

NetherlandsEnvironmental

Assessment

Agency,

the

Netherlands)

andKimonKeramidas(European

Commission,

JRC,Spain)VEmissions

Gap

Report

2023:Broken

RecordChapter5ReviewersLead

authors:

Jesse

Burton

(University

of

Cape

Town

and

Muna

Alamoodi

(Ministry

of

Climate

Change

andE3G,

South

Africa)

and

Greg

Muttitt

(International

Institute

for

Environment,

United

Arab

Emirates),

Jesica

Lelynn

AndrewsSustainable

Development

[IISD],UnitedKingdom)(UNEP

Finance

Initiative),

Oluleke

Babayomi

(ShandongUniversity),

Juliane

Berger

(German

Environment

Agency),Contributing

authors:

Fatima

Denton

(United

Nations

Marie

Blanche

Ting

(UNEP-CCC),

Pierre

Boileau

(UNEP),University

Institute

for

Natural

Resources

in

Africa,

Ghana),

Olivier

Bois

von

Kursk

(IISD),

Raymond

Brandes

(UNEP),

RutaSivan

Kartha

(Stockholm

Environment

Institute,

United

Bubniene

(Secretariat

of

the

UNFCCC),

David

Carlin

(UNEPStates

of

America),

Narasimha

Rao

(Yale

School

of

the

Finance

Initiative),

Rob

Dellink

(Organisation

for

EconomicEnvironment,

Yale

University,

United

States

of

America),

Co-operation

and

Development

[OECD]),

Subash

Dhar

(UNEP-Joeri

Rogelj

(Imperial

College

London,

United

Kingdom;

CCC),

Paul

Dowling

(European

Commission),

Swati

DsouzaIIASA,

Austria),

Saritha

Sudharmma

Vishwanathan

(Indian

(International

Energy

Agency

[IEA]),

Simon

Evans

(CarbonInstitute

of

Management

Ahmedabad,

India;

National

Brief),

Ivetta

Gerasimchuk

(IISD),

Niklas

Hagelberg

(UNEP),Institute

for

Environmental

Studies,

Japan),

Dan

Tong

Yasuko

Kameyama

(University

of

Tokyo),

Maarten

Kappelle(Tsinghua

University,

China),

Marta

Torres

Gunfaus

(IDDRI,

(UNEP),

Alaa

Al

Khourdajie

(Imperial

College

London),France)

andWilliamWills(CentroBrasilno

Clima,Brazil;Eos

Thaddeus

Idi

Kiplimo

(UNEP),

Andrea

Klaric

(EuropeanConsulting,

Brazil)Commission),

Gabriel

Labbate

(UNEP),

Kate

Larsen

(RhodiumGroup),

Gerd

Leipold

(Climate

Transparency),

Jian

Liu

(UNEP),Bert

Metz

(independent),

Bavelyne

Mibei

(UNEP),

ShonaliChapter6Lead

authors:

Narasimha

Rao

(Yale

School

of

the

Pachauri

(IIASA),

María

Paz

Cigaran

(Libélula),

BalakrishnaEnvironment,

Yale

University,

United

States

of

America)

and

Pisupati

(UNEP),

Dan

Plechaty

(ClimateWorks

Foundation),Yacob

Mulugetta

(University

College

London,

United

Kingdom)

Rula

Qalyoubi

(UNEP),

Mark

Radka

(independent),

ZoltánRakonczay

(European

Commission),

Andy

ReisingerContributing

authors:

Jesse

Burton

(University

Cape

Town

(Independent),

Jade

Roberts

Maron

(UNEP),

Yann

Robiouand

E3G,

South

Africa),

Joisa

Dutra

Saraiva

(Getulio

Vargas

du

Pont

(Climate

Energy

College,

Utrecht

University),

GregorFoundation

[FGV],

Brazil),

Ashwin

Gambhir

(Prayas

Energy

Semieniuk

(University

of

Massachusetts

Amherst),

Yuli

ShanGroup,

India),

Jessica

Omukuti

(University

of

Oxford,

United

(University

of

Birmingham),

Katia

Simeonova

(independent),Kingdom),

Nadia

S.

Ouedraogo

(United

Nations

Economic

Jim

Skea

(Imperial

College

London/IPCC),

Youba

SokonaCommission

for

Africa

[UNECA],

Ethiopia),

Setu

Pelz

(IIASA,

(IPCC),

Masahiro

Sugiyama

(University

of

Tokyo),

OksanaAustria),

Fei

Teng

(Tsinghua

University,

China)

and

Meron

Tarasova

(WMO),

Iman

Ustadi

(O?ce

of

the

UAE

SpecialTesfamichael(University

College

London,UnitedKingdom)Envoy

for

Climate

Change,

United

Arab

Emirates),

José

MariaValenzuela

(University

of

Oxford),

Chris

Vivian

(Joint

Groupof

Experts

on

the

Scienti?c

Aspects

of

Marine

EnvironmentalChapter7Lead

authors:

Oliver

Geden

(German

Institute

of

International

Protection

[GESAMP]),

Adrien

Vogt-Schilb

(Inter-Americanand

Security

Affairs,

Germany),

Mai

Bui

(Imperial

College

Development

Bank

[IDB]),

Daniel

Wetzel

(IEA),

Zhao

XiushengLondon,

United

Kingdom),

Matthew

Gidden

(IIASA,

Austria)

(Tshingua

University),

Maya

Zenko

Ulezic

(Europeanand

MercedesBustamante(Universidade

de

Brasília,

Brazil)Commission)and

Jinhua

Zhang

(UNEP)Chiefscienti?ceditorsContributing

authors:

Holly

Buck

(State

University

of

New

YorkatBuffalo,UnitedStatesof

America),

SabineFuss(Mercator

Anne

Olhoff

(CONCITO

–

Denmark’s

green

think

tank),

JohnResearch

Institute

on

Global

Commons

and

Climate

Change,

Christensen

(UNEP-CCC),

Simon

Maxwell

(independent)

andGermany),

Jan

Minx

(Mercator

Research

Institute

on

Global

NavrozDubash(CentreforPolicyResearch)Commons

and

Climate

Change,

Germany),

Gregory

NemetSecretariat,productionandcoordination(University

of

Wisconsin-Madison,

United

States

of

America),Joana

Portugal-Pereira

(COPPE,

Universidade

Federal

do

Rio

Anne

Olhoff

(CONCITO

-

Denmark’s

green

think

tank),

Juliade

Janeiro,

Brazil),

Gaurav

Ganti

(Climate

Analytics,

Germany),

Rocha

Romero

(UNEP-CCC),

Kaisa

Uusimaa

(UNEP)

andStephanie

Roe

(World

Wide

Fund

for

Nature

[WWF],

United

Maarten

Kappelle

(UNEP)States

ofAmerica),

Steve

Smith

(University

ofOxford,

UnitedKingdom),

and

Julia

Pongratz

(University

ofMunich

and

MaxMediaandlaunchsupportPlanckInstituteforMeteorology,Germany)UNEP

Communication

Division

and

UNEP-CCCcommunicationteamVIEmissions

Gap

Report

2023:Broken

RecordDesignandlayoutWeeks.de

Werbeagentur

GmbH

(?gures),

Strategic

Agenda(layout)and

Beverley

McDonald,

UNEP(coverdesign)TranslationoftheexecutivesummaryandlanguageeditingStrategic

AgendaThanksalsoto:Siska

Adriani

Ringbo

(UNEP-CCC),

Angeline

Djampou

(UNEP),Dany

Ghafari

(UNEP),

Selma

Hedges

(UNEP),

Andrea

Hinwood(UNEP),

Christian

Ibsen

(CONCITO

–

Denmark’s

green

thinktank),

Jason

Jabbour

(UNEP),

Jarl

Krausing

(CONCITO

–Denmark’s

green

think

tank),

Thomas

Laursen

(UNEP-CCC),Anita

Mujumdar

(UNEP),

Pia

Riis

Kofoed-Hansen

(UNEP-CCC),

Ignacio

Sánchez

Díaz

(UNEP),

Pinya

Sarasas

(UNEP),YingWang(UNEP)

andEdoardoZandri

(UNEP)The

2023

edition

of

the

Emissions

Gap

Report

is

supportedby

the

Environment

Fund,

UNEP’s

core

?nancial

fund.

UNEPwould

liketothank

the

ClimateWorksFoundation,

the

DanishMinistry

of

Foreign

Affairs,

the

Dutch

Ministry

of

EconomicAffairs

andClimate

Policy,

and

the

German

Government

andits

International

Climate

Initiative

(IKI),

for

their

support

for

theproductionofthe

Emissions

Gap

Report

2023.VIIEmissions

Gap

Report

2023:Broken

RecordVIIIEmissions

Gap

Report

2023:Broken

RecordGlossaryThis

glossary

is

compiled

drawing

on

glossaries

and

Carbon

dioxide

emission

budget

(or

carbon

budget):

Forother

resources

available

on

the

websites

of

the

following

a

given

temperature

rise

limit,

for

example

a

1.5°C

or

2°Corganizations,

networks

and

projects:

the

Intergovernmental

long-term

limit,

the

corresponding

carbon

budget

re?ectsPanel

on

Climate

Change,

United

Nations

Environment

the

total

amount

of

carbon

emissions

that

can

be

emittedProgramme,

United

Nations

Framework

Convention

on

for

temperatures

to

staybelow

that

limit.

Stated

differently,Climate

Change

(UNFCCC),

and

World

Resources

Institute.a

carbon

budget

is

an

area

under

a

carbon

dioxide

(CO

)2emission

trajectory

that

satis?es

assumptions

about

limitsAnnex

I

Parties:

Consistsofthe

groupofcountries

listed

in

on

cumulative

emissions

estimated

to

avoid

a

certain

levelAnnexI

tothe

UNFCCC.

Under

Articles

4.2

(a)

and

4.2(b)

of

of

global

mean

surface

temperature

rise.the

UNFCCC,

Annex

I

Parties

were

committed

to

adoptingnational

policies

and

measures

with

the

non-legally

binding

Carbon

dioxide

equivalent

(CO

e):

A

way

to

place

emissions2aim

to

return

their

greenhouse

gas

(GHG)

emissions

to

1990

of

various

radiative

forcing

agents

onacommon

footing

bylevels

by

2000.

The

group

is

largely

similar

to

the

Annex

B

accounting

for

their

effect

on

the

climate.

It

describes,

forParties

to

the

Kyoto

Protocol

that

also

adopted

emissions

a

given

mixture

and

amount

of

GHGs,

the

amount

of

CO2reduction

targets

for

2008–2012.

By

default,

the

other

that

would

have

the

same

global

warming

ability,

whencountries

are

referred

to

as

Non-Annex

I

Parties

(see

below).

measured

over

a

speci?ed

time

period.

For

the

purpose

ofthis

report,

unless

otherwise

speci?ed,

GHG

emissions

areAnnex

II

Parties:

The

group

of

countries

listed

in

Annex

II

to

the

sum

of

the

basket

of

GHGs

listed

in

Annex

A

to

the

Kyotothe

UNFCCC.

Under

Article

4

of

the

UNFCCC,

these

countries

Protocol,

expressed

as

CO

e,

assuming

a

100-year

global2have

a

special

obligation

to

provide

?nancial

resources

to

warming

potential.meet

the

agreed

full

incremental

costs

of

implementingmeasures

mentioned

under

Article

12,

paragraph

1.

They

Carbon

dioxide

removal

(CDR):

Refers

to

anthropogenicare

also

obliged

toprovide

?nancial

resources,

including

for

activities

removing

CO2

from

the

atmosphere

and

durablythe

transfer

of

technology,

to

meet

the

agreed

incremental

storing

it

in

geological,

terrestrial

or

ocean

reservoirs,

or

incosts

of

implementing

measures

covered

by

Article

12,

products.

It

includes

existing

and

potential

anthropogenicparagraph

1

and

agreed

between

developing

country

Parties

enhancementof

biological

or

geochemical

sinks

and

directand

international

entities

referred

to

in

Article

11

of

the

air

capture

and

storage,

but

excludes

natural

CO

uptake

not2UNFCCC.

This

group

of

countries

shall

also

assist

countries

directly

caused

by

human

activities.that

are

particularly

vulnerable

to

the

adverse

effects

ofclimate

change.Carbon

markets:

A

term

for

a

carbon

trading

system

throughwhich

countries

and/or

companies

may

buy

orsell

units

ofAnthropogenic

emissions:

Emissions

derived

from

human

GHG

emissions

to

offset

their

GHG

emissions

by

acquiringactivities.carbon

credits

from

entities

that

either

minimize

or

eliminatetheir

own

emissions.

The

term

comes

from

the

fact

that

CO2Baseline/reference:

The

state

against

which

change

is

is

the

predominant

GHG,

and

other

gases

are

measured

inmeasured.

In

the

contextof

climate

change

transformation

units

called

CO

equivalents.2pathways,

the

term

“baseline

scenarios”

refersto

scenariosbased

on

the

assumption

that

no

mitigation

policies

or

Carbon

neutrality:

Is

achieved

when

an

actor’s

netmeasures

will

be

implemented

beyond

those

already

in

contribution

to

global

CO2

emissions

is

zero.

Any

CO2force

and/or

legislated

or

planned

to

be

adopted.

Baseline

emissions

attributable

to

an

actor’s

activities

are

fullyscenarios

are

not

intended

to

be

predictions

of

the

future,

compensated

by

CO2

reductions

or

removals

exclusivelybut

rather

counterfactual

constructions

that

can

serve

to

claimed

by

the

actor,

irrespective

of

the

time

period

or

thehighlight

the

level

of

emissions

that

would

occur

without

relative

magnitudeof

emissions

and

removals

involved.further

policy

efforts.

Typically,

baseline

scenarios

arecompared

to

mitigation

scenarios

that

are

constructed

Carbon

price:

The

price

for

a

voided

or

released

CO

or

CO

e22to

meet

different

goals

for

GHG

emissions,

atmospheric

emissions.

This

may

refer

to

the

rate

of

a

carbon

tax

or

theconcentrations

or

temperature

change.

The

term

“baseline

price

of

emission

permits.

In

many

models

used

to

assessscenario”

is

used

interchangeably

with

“reference

scenario”

the

economic

costs

of

mitigation,

carbon

prices

are

used

asand

“no-policy

scenario”.aproxy

torepresent

the

levelofeffort

in

mitigation

policies.IXEmissions

Gap

Report

2023:Broken

RecordConditional

nationally

determined

contribution:AIntegrated

assessment

models:

Models

that

seek

tonationally

determined

contribution

(NDC

–

see

below)

combine

knowledge

from

multiple

disciplines

in

the

formproposed

by

some

countries

that

is

contingent

on

a

range

ofequations

and/or

algorithms,

in

order

toexplore

complexof

possible

conditions,

such

as

the

ability

of

national

environmental

problems.

As

such,

they

describe

the

fulllegislatures

to

enact

the

necessary

laws,

ambitious

action

chain

of

climate

change,

from

the

production

of

GHGs

tofrom

other

countries,

realization

of

?nance

and

technical

atmospheric

responses.

This

necessarily

includes

relevantsupport,

or

other

factors.links

and

feedback

between

socioeconomic

and

biophysicalprocesses.Conference

of

the

Parties

to

the

United

Nations

FrameworkConvention

on

Climate

Change

(COP):

The

supreme

body

Intended

nationally

determined

contribution

(NDC):ofthe

UNFCCC.

It

currently

meets

once

a

yearto

review

the

Intended

NDCs

are

submissions

from

countries

describingUNFCCC’s

progress.the

national

actions

that

they

intend

to

take

to

reach

theParis

Agreement’s

long-term

temperature

goal

of

limitingEmissions

pathway:

The

trajectory

of

annual

GHG

emissions

warming

to

well

below

2°C.

Once

a

country

has

rati?edover

time.the

Paris

Agreement,

its

intended

NDC

is

automaticallyconvertedtoits

NDC,

unless

it

choosesto

further

update

it.Emissions

trading:

A

market-based

instrument

used

tolimit

emissions.

The

environmental

objective

or

sum

of

Kyoto

Protocol:

An

international

agreementsigned

in

1997total

allowed

emissions

is

expressed

as

an

emissions

cap.

and

which

came

into

force

in

2005,

standing

on

its

own,

andThe

cap

is

divided

in

tradable

emission

permits

that

are

requiring

separate

rati?cation

by

Governments,

but

linkedallocated–

either

by

auctioning

or

handing

out

for

free–

to

to

the

UNFCCC.

The

Kyoto

Protocol,

among

other

things,entities

within

the

jurisdiction

of

the

trading

scheme.

Entities

sets

binding

targets

for

the

reduction

of

GHG

emissions

byneedto

surrender

emission

permits

equalto

the

amountof

industrialized

countries.their

emissions

(e.g.tonsof

CO

).

An

entity

may

sell

excess2permits.

Trading

schemes

occur

at

the

intracompany,

Land

use,

land-use

change

and

forestry

(LULUCF):

A

GHGdomestic

and

international

levels,

and

may

apply

to

CO

,

inventory

sector

that

covers

emissions

and

removals

of2other

GHGs

or

other

substances.

Emissions

trading

is

also

GHGs

resulting

from

direct

human-induced

land

use,

land-oneof

the

mechanisms

speci?ed

under

theKyoto

Protocol.

use

change

and

forestry

activities.Gross

national

income:

Gross

national

income,

abbreviated

Least-cost

pathway:

Least-cost

pathway

scenarios

identifyas

GNI,

is

the

sum

of

the

incomes

of

residents

of

an

the

least

expensive

combination

of

mitigation

options

toeconomy

in

agiven

period.

It

is

equal

toGDP

minus

primary

ful?l

a

speci?c

climate

target.

A

least-cost

scenario

is

basedincome

payable

by

resident

units

tonon-resident

units,

plus

on

the

premise

that,

if

an

overarching

climate

objective

isprimary

income

receivable

from

the

rest

of

the

wo