The best that we can hope for is that the world’s governments will arrive at a binding enforceable agreement to reduce greenhouse gas emissions 85-90% by 2050. This is the level the UN’s Intergovernmental Panel for Climate Change (IPCC) has stated is the necessary reduction needed to prevent the worst effects of climate change from occurring.
Currently the world’s leader in GHG emissions, the US, has failed to agree to emissions reductions which are considered to be the minimum by most of the world. President Obama has pledged to decrease US emissions 17% from 2005 levels. However, this is far short from the 20-45% reduction from 1990 levels, regarded as being the level at which the harshest of global warming’s effects can be avoided.
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