For the last 300 yrs Dave. It's in the part you edited out. Again, very dishonest to ask a question when the part you edit out contains the info you then ask.
1- Liar. http://en.wikipedia.org/wiki/Atmosphere_of_Mars 95% CO2, BTW. 2- pure stupid, since Saturn is a gas giant
Okay, since you're grasping at straws, yes, Mars has 0.06 percent of the atmospheric pressure of Earth, a tiny, tiny atmosphere. If you're going to compare a planet with virtually no atmosphere compared to Earth, like Mars, why not Saturn? And heck, why stop there?
No, I just means that I didn't read your question if it was in there. Here's a chart of hundreds of years of sunspot activity, please look since 1880 and note how the graph goes basically horizontally: <img src=http://upload.wikimedia.org/wikipedia/commons/thumb/2/28/Sunspot_Numbers.png/800px-Sunspot_Numbers.png></img> Here's a chart of temperature for the past 150, note that the graph goes up and up and up and up: <img src=http://upload.wikimedia.org/wikipedia/commons/f/f4/Instrumental_Temperature_Record.png></img> A blind man with a steel post through his skull can see that there is little correlation between the two.
LOL. I was told he said this, and I took Bloviate off my ignore list to confirm. Not only does Mars have an atmosphere, but dust storms are a serious problem for the rovers we have. . .errr . . . roving around up there. Mars used to have water. But I guess our SUVs created a time and space vortex to cause not just Global Warming, but Galactic Dryness as well. People that slept through science class will be surprised to learn that the planet was both a lot hotter and a lot cooler than now. Huge sheets of ice carved out the Great Lakes. But we are warmer now, so I guess Global Warming started ten thousand years ago. Check this out. 15 C cooler. 14,000 years ago the glaciers started to melt. If only Fred Flinstone hadn't been sporting around Bedrock in his SUV, we wouldn't have had all this global warming. http://www.on.ec.gc.ca/greatlakeskids/GreatLakesMovie5.html
The way I see it. The temp of the globe is going to spiral out of control, there are going to be brutal wars to obtain dwindling resources, mass extinctions will occur and the UN will call the only country who can deal with such disasters. Bangladesh.
Enjoy. Grasp what you can. Yes, they are. And you're right, Mars has a very, very tiny atmosphere. I was kind of debating how long it would take before you drifted into a fallacy of composition. Even more, because when the Earth was formed it was a fireball of lava, therefore global warming started then. Now a hasty generalization. Why not just research a logical fallacy list and use them in order.
What exactly is he generalizing? The current long term warming trend started 10,000 to 15,000 years ago. It has been brought up countless times on this thread and the MMGW cultist have failed to give an explanation of why we are not responsible for any warming from 15,000 BC to 1900 CE, but once it hit 1900 CE all the warming was caused by us. It makes zero sense.
How many cars were on the roads in 15,000 BC? What exactly is he generalizing? That because some warming was not caused by humans therefore this warming cannot be caused by humans. Here, let's put in different nouns: some (blank) was not caused by humans therefore no (blank) can be caused by humans, and let's see how the logic works: Some fire is not caused by humans therefore no fire can be caused by humans. Make any sense? Of course not.