Sounds like we need a "sun radiation tax". Applied only to the "wealthy" of course. The tax rate could revolve around the lux or lumens per square meter. Talk about about a government cash cow.
Venus has an atmosphere, and Mercury doesn't. Without an atmosphere to hold onto the heat from the Sun, the side of the planet Mercury facing away from the sun 'cools' the planet more. As a result, the difference in temperature between the two sides is about 600 degrees (Kelvin) Venus, on the other hand, has a very dense carbon dioxide atmosphere â 92 times denser than Earth. The atmosphere acts like a blanket, trapping the heat, and keeping the planet very hot. - Spydertrader
Maybe Venus had too many private planes and limos spewing green house gases from climate change summits of eons ago. I maybe wrong but I think it has something to do with the pressure differences in the planets atmospheres. Mercury has a very thin atmosphere and Venus as a very dense atmosphere with a pressure of 90 earth atmospheres. http://en.wikipedia.org/wiki/Gas_laws