If we do nothing about climate change, we’ll be living on a planet 4°C hotter by the end of the century. Climate change threatens much of life on Earth, with the extinction rate at roughly 100 times normal. Rising sea levels are already displacing entire communities, and could threaten hundreds of millions of people in the near future. What will it take to unf**k the climate? Action. Now.

The World Bank details why that should never happen: http://www.worldbank.org/en/news/feature/2012/11/18/Climate-change-report-warns-dramatically-warmer-world-this-century