The World Bank and the C40 – the mayors of the world’s 40 biggest cities – have come to an agreement to fund the fight against climate change! The leaders met in Sao Paulo in Brazil to come up with a concrete plan to cut their respective cities’ carbon footprints, and the World Bank promised financial support for those efforts.

Why is that news important? Well, megacities like New York, Rio de Janeiro, Paris and Jakarta are responsible for 12% of the world’s greenhouse gas emissions. And all too often, they just don’t have the budget to implement green-friendly projects without outside help. Plus, the World Bank released a study at the C40 summit that says around 1 billion people worldwide who are living in big city slums are especially threatened by climate change. So if the 40 biggest metropolises can charge ahead now, we could see some drastic improvements in creating a cleaner planet and a green future.

Do you live in any of the C40 megacities? If so, how has climate change affected urban life there?