Oh dear how many times are denier going to post this rhetorical nonsense.
The basis of this is that the Sun is causing Mars to warm, hence it is the same on Earth, ignoring that this squarely contradicts another denier theory that we are cooling due to low sunspot activity (I guess with so many theories it is hard to keep track of them all) or that the records of actual Solar activity show no sign of increased activity since the start of the satellite record over 30 years ago and the observed decline of the Southern Martian Pole has only been observed in the last in the last decade.
In the past deniers have quite often posted this
http://news.nationalgeographic.com/news/2007/02/070228-mars-warming.html
as the evidence of this theory, while this may have earned Habibullo Abdussamatov a number of trips to denier climate conferences, most deniers seem to fail to notice that this story has a second page.
http://news.nationalgeographic.com/news/2007/02/070228-mars-warming_2.html
were it is shown for the nonsense it is.
Our esteemed lead answerer (hee hee) has referenced this in the past when pretending to be "one of the most knowledgeable people" and stating that it's atmospheric pressure is the same as the top of Everest, so that would mean a human could survive in the open on Mars with just warm cloths and a tank of Oxygen, I'd like to see Jello try that, personally I'd prefer a spacesuit.
He also said it's atmosphere is almost entirely Co2 this at least is true, as long as you conveniently forget that it's atmospheric pressure is 1% of Earth there is virtually no water vapor (which is the main greenhouse gas on Earth) and Mars is much further from the Sun.
The fact is almost all the planets in the solar system have their own atmospheres and varying orbits this alone easily accounts for the changes seen on Pluto, we have only known Pluto even existed for 90 years out of a 248 year orbit so have no idea how it's climate changes through its orbit.
http://www.newscientist.com/article/dn11642-climate-myths-mars-and-pluto-are-warming-too.html
ichbas: check the bulk questions being asked by Ritchie in the main list, this is not about real answers, it's about points.