May be because the sun is not shining bright. In an average of 11 years, the rise and fall of the sun's energy output, subtly influence the earth's climate. The last solar maximum occurred in 2000, since then, an extended solar minimum is still maintained a dimming of the sun than usual. National center for atmospheric research, said Kevin Cui Bosi lower solar radiation can be accounted for as much as 15% of missing. Another theory is that the missing heat about 30% of the sun to prevent particles into the stratosphere the influx of - a lot of pollution is due to China's coal and some medium-sized volcanic eruptions, including Montserrat in the Caribbean, Papua New Guinea. The particles in the opposite way to work, the greenhouse gas, from the earth to reflect the sun's radiation.
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