It sure seems to be! The weather has changed so much ,I can't believe it. More severe storms, more hurricanes and tornadoes, One day it's hot and the next day it's windy and cool. If we don't try do something about it soon, we'll be in serious trouble.
There have been global warming and cooling periods throughout history going back to the Ice Age, when I think it was pretty cool. Temperatures rose during the Middle Ages and then we were on a downward trend until the mid-20th century. Since then the planet has been warming but we don't know if and to what extent we ourselves have been responsible. So we should sensibly do what we can to not assist in the planet's warming while not destroying our economy at the same time. I think when people like Sheryl Crow, who suggested everyone just use two sheets of toilet paper per visit are perhaps going a little too far.