I didn't know that. That said, Obama single handedly allowed the Iranian regime to progress uninterrupted with their nuclear program by signing a deal (which was then revoked by Trump, out of all people).
Regarding climate change, that's true..(Trump doesn't even "believe" in climate change lol, might as well be a flat earther...) however I fail to understand how creating a marine park or advocating for earth preservation is deserving of a peace prize... Take a look at past recipients: Even Gandhi, a most deserving candidate surely, didn't get the Nobel peace prize which says something about their criteria.
I guess most people who promote and help bring peace don't do it for the prize anyway.