Intelligent people know that global warming causes climate change. Intelligent people know that people are the major reason. Intelligent people know that greenhouse gases cause it. Intelligent people know that people are already sick and dying from it. Intelligent people know that we may be too late to save our home.

What they may not know is that there are many greenhouse gases. What they may not know is exactly how greenhouse gases work. What they may not know is that there are many more contributors to warming than fossil fuels. What they may not know is that overpopulation is the major cause, as more people use more fossil fuels and eat more methane producing animals and fruits and vegetables that used N2O producing fertilizers. They move to cities built on fertile soil and move into and work in concrete buildings that emitted a great deal of CO2 in their production. What they may not have thought about is that fossil fuel producing and using industries have the backing of the governments that their finances and lobbying have put into office. They may not know how much their senators and representatives have collected from the fossil fuel industries. Reducing overpopulation will be fought by some powerful religions and by reactionary forces in society that back the long-held traditions.

And there is so much more they should know.

But the essential changes can be made through the democratic process–however they will be major inconveniences for all–citizens, legislators and businesses.