A vital topic indeed. None of the links worked for me, the third being just a search results for “ice cores.” Nonetheless
one of them was a fascinating history of climate science I spent the last hour reading. It basically concludes with what we know: the climate system is a highly-sensitive one and man-made greenhouse emissions and other human-caused input is driving a powerful feedback loop that probably already is driving us into an unbearably hot and “challenging” future, unprecedented in human history and possibly pre-human history as well. Anything we can do to mitigate it now should be our number one priority, but with political and moral descent into catastrophic ignorance and greed, this effort needs a lot more people to speak up bravely, and in concert, about everything that’s going wrong. We must change our lives, to paraphrase Rilke, in much bigger ways than we can imagine.