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It's the Sun!
This is a common myth. It sounds sort of logical if you don't understand the contexts involved. The fact is that we receive most of our heat energy from the sun and a little bit from the heat stored in the earths core. But does that mean this global warming event is caused by the sun? No. Here's why:
Located in Projects & Resources / … / Global Warming / Myths vs. Facts: Global Warming
Solar Influence
Observations of sunspots began in the time of Galileo, about 400 years ago. Heinrich Schwabe recognized the 11.1 year solar cycle average in 1843. Science is working to improve our understanding of solar activity but beyond 400 years it becomes increasingly speculative.
Located in Projects & Resources / Environment / Global Warming