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Why does NASA even have to do this? Build some cool rockets and get us to mars.
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Among other objectives, NASA's 1958 mission statement includes conducting aeronautical and space activities of the US for "the expansion of human knowledge of phenomena in the atmosphere and space".

So: atmospheric climate science directly falls under NASA's responsibilities.

https://en.wikipedia.org/wiki/National_Aeronautics_and_Space...

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NASA launches and operates Earth-observing satellites for measuring the weather and climate.
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Living on Mars long-term is a practical impossibility. Certainly much, much harder than living on even a climate-changed Earth.
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I’ve been living on a climate-changed earth for my entire life and it’s not been too difficult.
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Humans have done a lot of things we once thought were impossible.
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