Last year, we started something big. Planet-sized big. We demanded real action on climate change and world leaders came together to create the Paris Agreement to stop the crisis.

Now it’s time to build on this victory. Earth Day, April 22, was the first day that countries could sign on to the Paris Agreement. On that day, leaders from 175 nations came together at the UN to sign the agreement and publicly committed to cutting greenhouse gas emissions. It may have been the most important Earth Day ever. Because each signature takes us one step closer to the agreement taking effect all around the world – and one giant step closer to a safe and sustainable future for the planet we call home.