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15 Cards in this Set

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Concern about global warming
Build up of GHGs
CO2
Levels have from risen 315ppm in 1950 to reach 600ppm in 2050. Due to burning of fossil fuels and deforestation
Methane
World’s 2nd largest contributor to global warming. Is increasing 1% per year. Cattle convert 10% food into methane, 100m tonnes per year. Paddy fields emit 150m tonnes per year. Bogs trapped in permafrost will melt.
CFCs
Increasing 6% per year, up to 10,000x more efficient at trapping heat than CO2.
Global emissions of GHGs
Agriculture -14% (mostly from soils & livestock) Energy – 61% (consuming fossil fuels) Land use changes – 18% (primary deforestation)
Effects of global warming
Rise in sea levels → flooding in low-lying areas, up to 200 people could be displaced. Increase in storm activity due to more atmospheric energy. Change in agricultural practices. Reduced rainfall in USA, S.Europe & CIS. Extinction of up to 40% wildlife species.
Global warming, changes in climate
Temperature, wind, precipitation, pressure, humidity… Storms, drought, fire, erosion, landslides, sedimentation, avalanches, pests, diseases
Global warming, changes due to sea-level rise
Coastal erosion, flooding, salination, river flooding, bank erosion, waves, tsunami
Emissions of CO2 due to
Size of human population, amount of energy used per person, level of emissions resulting from use of energy
Reduce CO2 emissions by
Improving energy efficiency, fuel switching, use of renewable energy sources, nuclear power, capture & storage of CO2, increasing number of forests
Climate change impacts food
Possible rising yields in some high-latitude regions, falling crop yields
Climate change impacts water
Small mountain glaciers disappear, decreases in water availability Mediterranean, S.Africa, Cities threatened by sea-levels
Climate change impacts ecosystems
Damage to coral reefs, Species extinct
Climate change – Extreme weather events
Rising storm intensity, forest fires, droughts, flooding & heat waves
Climate change – Risk of abrupt & major irreversible changes
Increasing risk of dangerous feedbacks & abrupt large-scale shifts in climate system