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Carbon dioxide levels
The level of carbon dioxide in the atmosphere, was measured in ancient ice, about 290 parts per million. In 1824 the Earth's atmosphere retains heat radiation. When a man theorized that the Earth's serface emitted invisable infrared radiation. Somehow the Earth kept in the heat. He tried to prove it with a glass box over a world globe. -
Greenhouse gases
Discovered ice ages, studying how gases block heat. Guessed that gases were entirely transparent. It was confirmed for the main atmospheric gases. Oxygen and Nitrogen, found that Carbon dioxide, gas, and water vaper. And blocks heat radiation. -
Calculations
It was calculated that cutting the amount of carbon dioxide in the atmosphere by half might lower global temperatures a few degrees. It is sufficient to bring on an ice age. It is also calculated that doubling the carbon dioxide levels might raise global temperatures a few degress. Coal burning added a large amount of the gas to the atmosphere. And that is what doubled the carbon dioxide. -
Theory on ice ages
Over thousands of years there would be periods when the sunlight in a falling hemisphere was slightly weaker in the summer. Less of the snow in high laltitudes would melt away. Covering of snow would reflect enough sunlight to help keep an area (region) cold. Snowfields could grow over the centeries into an ice sheet. Thousands of years later the sunlight would get hotter and the ice age would die off. -
Changes in the past climate
Ice extracted from the full depth of the greenland ice sheet showed. 8,000 to 10,000 years since the last glacial epoch did not. Period of stable climate which human civilization growing might be not normal. Whether climate might either get warmer or colder much quicker. Throught out the decades. -
Hghest temperatures
Temperatures rose to levels that have'nt been seen in thousands of years. The temperatures affected plants an animals. Earth was warming at a rate of 0.36 degrees for the last 30 years. The temperatures are the highest since the 12,000 ice age. The National Scientist Academy provided this information.