The other day I was watching a show on global warming that was showing astronomers that had an orbital model. the earthis on an eliptical orbit around the sun.No planet does. Picture if you can an eliptical rubberband but it is stiff but plyable.It holds it shape. Now grab each end of the longest diameter with your fingers.Now if pull on the rubberband a little. The ends pull farther apart and the sides move a little closer..let go and the ends move closer and the sides move farhter away.If you do this you see how the orbit of earth changes it orbit back and forth throughout it's cycle. And they have proven that it's cycle is roughly every 100 yrs. so every 50 ish yrs we go from one extreme to the other.And theres no way we can stop it. And right now we are at our cloest to the sun And yes Mars is going through the same warming patern. But then alot of the meteoroligist say the measured output of the sun hasn't changed. And the way it's measured that's true. Take a propane torch and light it. Set the flame to a constant output no wold your hand above it about 5 ft. Nowove your hand 6" closer. Feel the heat change? The output of the torch didn't change but it got warmer. Astronomers have known this for years. But the eco-freaks just don't listen. So yes there is global warming and man has a very small impact on it. I have been an amatuer Astronomer for many years and know a few scientist at the U of A and they say the same thing. I have seen Algore's movie 1-1/2 times. couldn't stand it the second time. The senario he dipicts is actually very plausible. During the warm period the poles mely a little and the cool periods show patterns of cooling and wet periods. But to put the whole world in an alarmists attitude to it. While taking it to the bank. Remember Al Gore was a medeocre student but an excelent "politician". Now everything the astronamers are saying is based on phsics. A very real and reliable proof.Don't use 50 cents words while talking to a liberal. The use of "eliptical" will do nothing but confuse them. I gotta hand it to Algore as he has sold the liberals on the idea of buying and selling "Carbon Credits" pure genius, pay money to ease your conscious. Gonna trade credits on the Mercantile Exchange just as they do with pollution credits, another racket to promote the re-distribution of wealth. But then again liberals that follow Algore are not the brightest lights in the harbor. Guess you can sell them on anything, Barnum was right.