2015 has been a year of historic storms, record high temperatures, and rising sea levels. There is no doubt—climate change is here. And we've got to do something about it now, before it's too late.

Luckily, something really incredible is happening in Paris this December, when world leaders will gather for COP21, a once-in-a-lifetime opportunity to forge a crucial climate agreement between nations. While they negotiate about the fate of the planet, community organizers, businesses, innovators, and citizens like you will be able to send them a message.

So, this is it: Our chance to tell world leaders that we care about the outcome of Paris. That's why we here at GOOD are teaming up with a group of remarkable partners—from the United Nations Foundation to The City of Paris—to ensure we make the most of this historic moment.

Let's make sure they hear our voice. Visit earthtoparis.org to find out how you can take part in this extraordinary movement. (We'll be updating with big news very soon.) In the meantime, download this digital toolkit for easy ways to participate. Plus, join us today—and every week—for a conversation on Twitter leading up to COP21 with the hashtag #EarthToParis:

October 19, 2-3 p.m. ET: “Earth To Paris: Add Your Voice" – Earth To Paris Kick-off chat

October 22, 2-3 p.m. ET: “Cooking Up Change" – Climate change and clean cookstoves

October 29, 2-3 p.m. ET: “Healthy Planet, Healthy People" – Climate change and global health

November 5, 2-3 p.m. ET: “Climate and the Girl" – The unique connection between girls, women, and climate change

November 12, 2-3 pm ET: “All Cities Lead to Paris" – Cities and sustainable energy solutions

November 19, 2-3 p.m. ET: “The Last Generation to End Climate Change" – Climate change and youth

December 3, 2-3 p.m. ET: “A Climate for Change" – Climate change and the global goals

This is our shot to turn words into action. We really can end climate change—but we've got to do it together.