But in June 2017, the USA — the world's second biggest polluter — vowed to pull out of the deal now agreed between every single one of the world's other 197 countries. Other world leaders were horrified but now, led by China and the European Union, they seem more than ever determined to stick to the 2015 deal. It looks like the USA, under President Donald Trump's leadership, is moving backwards by supporting polluting fossil fuels for short-term gain. Sadly, this not only makes the future look more difficult for today's kids. It also means that the USA will likely lose its lead in renewable energy technologies. These are the future.