Is The World Really Warming Up? If Not, Why Do They Say It Will?

It's too early to tell if the earth is warming up. When CO2 concentrations reach about 550 ppm, average annual global temperatures are expected to rise by 4' to 9'F. Predictions of when this doubling will occur vary. The year 2050 is commonly cited, but because gases other than CO2 are contributing to the greenhouse effect, the warming may occur as early as 2030.

Proponents of the greenhouse-effect theory believe that human activity has already put enough of the various gases into the atmosphere to cause a significant rise in temperature in the next century. They contend that some warming is inevitable even if all emissions were to stop today, because the greenhouse gases are already in the atmosphere.