Top Ten Things to Know About Global Warming Number Ten • There is a scientific consensus that human activities are very likely to affect global climate Number Nine • There is some chance that, due to the uncertainties of complex models and the assumptions used to drive them, the consensus is wrong. Number Eight • Ignoring the potential implications of climate change is taking a big risk with a valuable asset. – The Intergovernmental Panel on Climate Change (IPCC) recommends that we avoid “dangerous human interference” with global climate systems. Number Seven • In order to avoid dangerous interference, IPCC estimates that we need to hold global emissions about steady. Number Six • Since the developing world would still like to develop, the developed world must make substantial emissions reductions. – IPCC says 70-80 percent of current levels must be reduced by 20402050. Important Data 8.00E+09 7.00E+09 6.00E+09 5.00E+09 4.00E+09 3.00E+09 2.00E+09 1.00E+09 0.00E+00 World Population USA OECD Asia Total Carbon Emissions More Important Data 6 5 4 3 2 1 0 World USA OECD Asia Per Capita Carbon Emissions Number Five • The Kyoto Protocol will result in only modest emission reductions – The US has not yet ratified this treaty Number Four • We have 30-40 years to transform industrialized society – Reducing emissions by 70-80 percent is a substantial challenge US Greenhouse Emissions HFCs, PFCs, SF6 N2O 2% 6% CH4 9% CO2 83% US CO2 Emissions Everything Else 3% Fossil Fuel 97% US Fossil Fuel CO2 Emissions Commercial Residential 4% 7% Industrial 17% Electricity Generation 40% Transportation 32% Number Three • We already have technologies that can help us on the way – Efficiency – Renewable Energy – Coal-gasification with carbon sequestration Number Two • The behavioral challenges are much more daunting than the technological ones. Number One • Climate change isn’t likely to affect our generation. • We need to make changes for subsequent generations.
"Top Ten Things to Know About Global Warming - PowerPoint"