Rising emissions of heat-trapping greenhouse gases are widely blamed for causing global warming, and risk more extreme weather and higher sea levels.
The table below shows:
(1) annual global carbon dioxide (CO2) emissions, in billions of tonnes, from burning fossil fuels and making cement
(2) annual CO2 emissions from deforestation, after allowing for tree planting
(3) concentrations of CO2 in the atmosphere, in parts per million
(4) global greenhouse gas (GHG) emissions, in billions of tonnes of CO2 equivalent
Note: Levels of ozone-depleting gases have plummeted since the phase-out starting in 1987. Excluding these, other greenhouse gas emissions rose much faster in the 1990s.
Sources:
(1) U.S. Carbon Dioxide Information Analysis Center and Netherlands Environmental Assessment Agency (PBL)
(2) Woods Hole Research Centre
(3) U.S. National Oceanic and Atmospheric Admin (NOAA)
(4) PBL
(5) World Meteorological Organisation
(6) Ice core data, University of Bern, 1750 - 1950
(7) Vostok Ice Core, before 1750 (Compiled by Gerard Wynn)
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