In this video Bill Nye, the Science Guy, explains the fundamentals of climate science, which have been understood by scientists for decades. Just like the tobacco lobby did with the clear evidence linking smoking with health effects, the petroleum industry has been trying to cast doubt on the science of climate change. The tobacco lobby managed to delay government action for the sake of public health on their industry for 3 decades – how long will the petroleum lobby be successful in their campaign? If they manage to delay action for 3 decades, we will have lost the window to take effective action on climate change. It’s time to stop the debate and the denial, and move on to solutions. Take the time today to write or phone at least one (more is better!) of your elected officials to let them know you’re concerned about climate change, and you want them to take action.