Not sure what the point you’re trying to make? Are you under the impression that the earth’s atmosphere was the default atmosphere for every other planet in the solar system? Like every planet started out with lush plant life and water and then shit just went south for them? My sweet summer child. I don’t think you thought this through completely. But what else is new? lol.
But thanks for using Venus to prove that CO2 is a pretty effective greenhouse gas though. Sure don’t think humans could survive there. Maybe we should do things to limit the amount of CO2 we are pumping into the sky? Because even a couple degrees one way or the other is bad news for us.
I think that's the point Cpeer! You're arguing humans producing "greenhouse gases" could lead us to same the fate we see on Venus, yet there are no humans there responsible for all that CO2! It's happened without human hands did it not?
Is it not also happening here on Earth, only to a lesser degree? So the question is, are humans capable beyond the Earth's normal production of CO2 of turning Earth into another Venus? Well, considering how much
more CO2 we'd have to produce to make Venus happen here...highly unlikely.
excerpt
"Climate change is not a new experience for Earth. The planet has gone through countless temperature fluctuations over its 4.6-billion-year history, from
frozen snowball to blazing tropical heat.
Without the greenhouse effect, the Earth would have an average temperature of -18 °C...too cold for most humans to live.
But despite all these changes, Earth always swings back into roughly the same temperature range. That is because
it has mechanisms in place to control its own temperature. (read that again)
The question is, could we trigger a runaway greenhouse effect ourselves?
A study published in 2013 suggests that
it is possible, but
we would have to release a truly staggering amount of carbon dioxide. This gas currently makes up almost 400 parts per million of the air, up from 280ppm before the Industrial Revolution. To trigger a runaway greenhouse effect,
we would have to get the level up to 30,000ppm. That would take about
10 times more carbon dioxide than could be released if we burned all known fossil fuels! There are other sources of greenhouse gases, like the seabed methane that escaped during the PETM, so we cannot absolutely rule it out. But it seems that the likelihood of us being steam-cooked is pretty low"
Source:
http://www.bbc.com/earth/story/20151130-how-hot-could-the-earth-get
