Peter Berkeley passed this item along from Snopes:
A 14 August 1912 article from a New Zealand newspaper contained a brief story about how burning coal might produce future warming by adding carbon dioxide to the atmosphere.
The furnaces of the world are now burning about 2,000,000,000 tons of coal a year. When this is burned, uniting with oxygen, it adds about 7,000,000,000 tons of carbon dioxide to the atmosphere yearly. This tends to make the air a more effective blanket for the earth and to raise its temperature. The effect may be considerable in a few centuries.