Most of us agree that Earth's climate is changing and it's having a negative effect on our environment. But new studies have emerged that suggest we might be reaching the point of no return when it comes to reversing the damage that's already been done.

Susan Solomon, a respected climate researcher said recently, "People have imagined that if we stopped emitting carbon dioxide the climate would go back to normal in 100 years, 200 years; that's not true." The longer we wait to address important issues like carbon emissions, deforestation, oil spills, etc., the more irreversible these effects will be.

The good news: since much of global warming can be attributed to human activity, we have the power to reign in our destructive behaviors with the hope of slowly turning climate change around.

We must not ignore this call to action. Sign the pledge promising to do all you can to help reverse the course of global warming.