Global Warming Worries Exaggerated, New Study Reveals.

• The sun, that's where the heat comes from.
• Let us all at dawn every morning face the sun and hold our breaths. Sarcasm ended.

An excerpt from the news item;

Lead author Andreas Schmittner from Oregon State University, US, explained that by looking at surface temperatures during the most recent ice age - 21,000 years ago - when humans were having no impact on global temperatures, he, and his colleagues show that this period was not as cold as previous estimates suggest.
"This implies that the effect of CO2 on climate is less than previously thought," he explained.

More about how science admits they might be wrong BBC NEWS [UK] by Jennifer Carpenter.