Are there technically feasible and cost-effective options to mitigate or adapt to climate change?
• Stabilization of the atmospheric concentrations of carbon dioxide at any level at, or below, three times pre-industrial levels will eventually require global emissions to drop below today’s levels; • Significant “no-regrets” opportunities, these which make sense for other reasons in addition to climate change, are available in most countries to reduce net greenhouse gas emissions. Furthermore, the risk of aggregate net damage due to climate change, consideration of risk aversion, and the precautionary principle provides rationale for actions beyond “no regrets;” • A range of cost-effective technologies and policies can be used in both developed and developing countries to markedly reduce the net emissions of greenhouse gases from industrial, energy supply, energy demand, and land management practices. Projected greenhouse gas emissions can be reduced by 10-30% using current technologies over the next two to three decades at little cost; • It is technically possible to realize deep em
