All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. There's no empirical evidence "There is no actual evidence that carbon dioxide emissions are causing global warming.
Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. Note that computer models are just concatenations of calculations you could do on a hand-held calculator, so they are theoretical and cannot be part of any evidence." (David Evans)The proof that man-made CO2 is causing global warming is like the chain of evidence in a court case.
CO2 traps energy at very specific wavelengths, while other greenhouse gases trap different wavelengths.
In physics, these wavelengths can be measured using a technique called spectroscopy.
Agriculture as we know it would be more or less impossible if the average temperature was −18 °C.
In other words, it would be freezing cold even at the height of summer.According to the WMO, the hottest was 56.7°C (134°F), measured on 10 July 1913 at Greenland Ranch (Death Valley).Man could not survive in the temperatures on the moon, even if there was air to breathe.We know from bubbles of air trapped in ice cores that before the industrial revolution, the amount of CO2 in the air was approximately 280 parts per million (ppm).In June 2013, the NOAA Earth System Research Laboratory in Hawaii announced that, for the first time in thousands of years, the amount of CO2 in the air had gone up to 400ppm.And there is empirical evidence that the rising temperatures are being caused by the increased CO2.The Earth is wrapped in an invisible blanket It is the Earth’s atmosphere that makes most life possible. On the surface, the moon’s temperature during daytime can reach 100°C (212°F).The reason that the Earth is warm enough to sustain life is because of greenhouse gases in the atmosphere.These gases act like a blanket, keeping the Earth warm by preventing some of the sun’s energy being re-radiated into space.At night, it can plunge to minus 173°C, or -279.4°F.In comparison, the coldest temperature on Earth was recorded in Antarctica: −89.2°C (−128.6°F).