Climate change is affecting every country in the world. It is disrupting ecosystems, economies and people’s lives, and in the future its impact will be even more severe. The effects of climate change include rising temperatures, changing precipitation patterns, rising sea levels and more extreme weather events. Climate change is being driven by greenhouse gas emissions from human activities and the concentration of these emissions has now reached unprecedented levels. If we do not act immediately, the temperature of the world’s surface could rise by as much as 4°C on average by the end of this century, and by even more in some parts of the planet. The adverse impacts of climate change will hit the poorest and most vulnerable people hardest.