We run enormous risks and we know what kind of reductions of greenhouse gases are necessary to drastically reduce risks. Reducing emissions by half by 2050 is roughly in the right ballpark. It would bring us below 550 ppm.
Nicholas SternThe scientific evidence is now overwhelming: climate change presents very serious global risks, and it demands an urgent global response.
Nicholas SternFortunately poorer countries, such as China, are showing leadership and beginning to demonstrate to the world how to invest in low-carbon growth.
Nicholas Stern