The public school system in Portland, OR, has decided to no longer use education materials that cast doubt on the leading cause of climate change: humans. Sign the petition to show your support for science over ideology.

By adding your name to the millions already calling for global climate action, we will remind leaders this agreement is a historic one, brought about by the actions of millions.

Download the "Earth Mode" Chrome extension to see how much energy you are using while browsing the Internet.

Take the Ecological Footprint Quiz and learn how you can reduce your impact on the planet.

The meat industry generates nearly one-fifth of the man-made greenhouse gas emissions worldwide. Help make a difference by limiting your meat consumption.

Eat healthier and help reduce your carbon footprint by buying local produce. Take the pledge and we'll show you how to find local produce near you.

Junk mail is not only a major inconvenience, it also has an extremely negative impact on the environment. Help reduce the amount of junk mail you receive.

Help end our obsession with plastic and protect the environment. Take the pledge to stop using disposable plastic.

More than a billion pounds of food are thrown away every year. Help make a difference by turning your food waste into soil.

Every year, thousands of old electronic devices are thrown into landfills, polluting the environment, when they can be recycled. Pledge to recycle your e-waste.