If we continue burning fossil fuel at the current rate, sometime in the foreseeable future we will reach the point of no return. The temperatures of the atmosphere and the earth will rise, the icecaps will melt, the continents will be inundated, crops will wither, and life on earth will become hell. Earth scientists looking back 800,000 years have established that long, irregular periods of temperature variation occurred as a result of changes in radiation from the sun. The temperature changes are measured by changes in the concentration of fossilized plant stomata and in varying amounts of carbon dioxide contained in ice cores extracted from Antarctic and Greenland glaciers.
展开▼