We aren't the only cause
As much as many have come to believe that we are the main cause of global warming, many climatologists are looking at an age old cause - solar output. While mankind's activities are a contributing factor, the variations in solar output have a far greater impact on Earth's climate.
Just a reminder - Earth's icecaps have been melting for the past 6,000 years. It is not a recent event. The rate of melting hasn't been constant.
One article I ran across said that something like 36 cubic miles of ice melt in Antartica every year. At that rate it will all be gone in...let's see...about 194,000 years.
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