The science around man-made global warming is supposed to have been settled years ago. Otherwise, governments around the world wouldn’t be spending billions of dollars to reduce emissions of carbon dioxide. Right?
There’s hardly a month that goes by, however, when some news story from reputable sources doesn’t cast doubt on the settled science, which holds that the Earth is experiencing global warming because of human CO2 emissions.
The latest news story to raise eyebrows is that the whole of the Earth heated up in medieval times (during the Medieval Warm Period over a 1,000 years ago) without human CO2 emissions. The Earth then cooled down naturally in what has become known as the “Little Ice Age.” Neither of these climate events have been attributed to man-made causes.
Heretofore, the Intergovernmental Panel on Climate Change (IPCC) has argued that the Medieval Warm Period was confined to Europe and that the world-wide warming we’re experiencing now is caused by human activity.