Climate change

Glen Meaken at the Pittsburgh Tribune-Review:

One year ago, I believed that man-made global warming was true, with temperatures rising dangerously due to increasing levels of carbon dioxide (CO2) in our atmosphere.

I also believed that a consensus of the international scientific community supported these conclusions.

....

Then I began some real research on the topic.

I quickly discovered three critical things:

• First, the Earth has experienced significant warming over the past 18,000 years that has nothing to do with human activity.

• Second, more recent temperature variations demonstrate that there is little or no correlation between levels of atmospheric CO2 and temperature.

• And third, there is no "consensus" among scientists on climate change.