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There is no question that we are in a warming trend. There is a ton of evidence to prove this. The question is: are the thing we humans doing to the planet causing the warming trend to be worse than it would have been without us? That is something we just don't know. There is not enough evidence to know that we for sure are and there is not enough to say that we are not.
We have two choices.
1. We can do nothing and assume we are not harming the planet or causing an increase in warming. Maybe nothing will happen. Maybe something catastrophic will happen.
2. We can work to clean up our emissions, lower green houses gases and generally clean up the world. Maybe it won't help one bit. Maybe nothing will happen and we didn't need to do it to begin with, but in the end we have a cleaner, healthier planet to live on.
In reality we will probably all be dead before we find out the final outcome of all this anyway.
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