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Lecture 14

ENVIRON 157 Lecture Notes - Lecture 14: Carbon Cycle, Emission Intensity


Department
Environment
Course Code
ENVIRON 157
Professor
Anupom Ganguli
Lecture
14

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PUB POL Week 5 Lect 3
Global fossil CO2 emissions are dominated by electricity, heat, & energy (45%), industry (23%), &
national transport (19%).
International aviation and marine bunkers are 3.5% & remaining sectors 10%.
Coal CO2 emissions are dominated by electricity, heat, and industry,
with both showing significantly lower growth & even declines in the last few years
Oil CO2 emissions are dominated by national transport with almost linear growth over five decades
Road transport is half the total growing at 1.9% while national & international aviation is 8% growing at
3% per year
Gas CO2 emissions are dominated by electricity & heat, industry, and other commercial & residential
sectors
Gas CO2 emissions are growing rapidly in most countries and sectors, dominating growth in CO2
emissions in recent years.
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Land-use change emissions are highly uncertain, with no clear trend in the last decade.
Total global emissions: 42.1 ± 2.8 GtCO2 in 2018, 55% over 1990
Percentage land-use change: 39% in 1960, 14% averaged 20092018
Carbon emissions are partitioned among the atmosphere and carbon sinks on land and in the ocean
The “imbalance” between total emissions and total sinks reflects the gap in our understanding
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