Not long ago, mankind has wondered about the occurrence of end of the world, and one of the first had the thought that we would soon destroy the Ozone Layer, and we all die from the harmful ultraviolet rays.
Over the last few years of observations, scientists noticed that the number of solar radiation, passing through Earth's atmosphere has decreased by 12%. 9% in Antarctica, at 10% in the U.S. by 30% in Russia and 60% in some parts of England.
Because of what is going on a global darkening?
Simple: pollution leads to the fact that the Earth's atmosphere gets a huge number of different particles that settle in it, making it difficult passable for sunlight. Just as sunlight is reflected from clouds, they are reflected from these particles from the upper atmosphere.
But the assembly of these particles is one important difference from the clouds. Because of condensation in clouds formed water that falls as rain on land. The particles of the same and continue to hover in the upper atmosphere, continuing to reflect solar rays.