Greenhouse effect
The sunlight goes through the atmosphere and there 26% of the sunlight reflects right back to space because of clouds and tiny particles in the atmosphere, but the clouds and the particles absorb around 19% of sunlight. About 55% of sunlight reaches the Earth’s surface but 4% reflects right back to space. The rest consist of 51%, but they affect the melting glaciers, evaporation of water, the surface heat and plant photosynthesis. The sunlight that reaches the Earth’s surface is light and another electromanatic radiation with short wavelength. Their energy warmths the earth but she? ( the earth) sends them away as thermal radiation with considerably more wavelength then the originally light. Only a fraction of the thermal radiation exits the atmoshpere, majority ( of the thermal radiation ) is captured by molecules in the atmoshpere that are called the Greenhouse gases. The gases are carbon dioxide (CO2), water vapour, methane, nitrous oxide (N2O), ozone (O3) and various halogen-carbon wich are made in industry. [2] This is the natural process of Greenhouse effect.
For the last two centuries the quantity of carbon dioxide has increased. First and foremost because we, the mankind, burn considerable amount of fossil fuels such as coal, gasoline and crude oil. While burning fossil fuels and other petrochemical in power stations, the carbon dioxide that organism and plants had captured with photosynthesis for a couple of millions years. It doesn’t help that we now cut down much more trees than we plant. That leads to less trees to absorb carbon dioxide with photosynthesis and the amount of carbon dioxide increases even further.
Without the Greenhouse effect the average temperature would be around -18°C, not 15°C like it is.
