Global warming is not caused by man-made greenhouse gases, but just a natural event. It is part of a cycle of warming and cooling that happened regularly every 1,500 years for the last million years, two respected British researchers claim.
The most recent global warming was between 1850 and 1940, researchers Authors Dennis Avery and Fred Singer say, and was therefore probably not caused by man-made greenhouse gases. Historical evidence of the natural cycle also includes a record of floods on the Nile going back 5,000 years; Roman wine production in Britain in the first century AD; and thousands of museum paintings that portray sunnier skies during what is called the Medieval Warming, and more clouds during the Little Ice Age.
Besides, they suggest that even if our climate is changing, it is not all bad, because past cold periods have killed twice as many people as warm periods. Moreover, in the current warming cycle, they say there is evidence that storms and droughts have been fewer and milder; corals, trees, birds, mammals and butterflies have adapted well; and sea levels are not rising significantly.
