Try the equivalent of 400,000 Hiroshima bombs a day. http://thinkprogress.org/climate/2013/12/22/3089711/global-warming-hiroshima-bombs/
As they say in legal proceedings if you haven't got the facts attack the witness. It seems that's all denialists can do other than making it up. Apparently there's some payoff to living in la la land.
250 trillion Watts....... Wow! Except that is 1/747371th of the energy the sun pours down on the earth daily. With an average albedo of 64, 1/478317th of the energy the earth absorbs (~2 parts per million). This is as silly as the nearly successful attempt to ban di-hydrogen monoxide.