Those who come after us will either curse us — or thank us

(CNN)I first saw that climate was changing in 2000, when I went to Antarctica to study penguins. A senior scientist showed me how much a glacier near the research station had shrunk during his 20 years there. I later saw accelerated melting in the high Arctic in Svalbard, Norway, and in southern Alaska, I saw entire forests dying because winters were now warm enough for bark beetle infestations. It will get worse. The scientifically measured predictions have panned out and the bad times have begun. Centuries of burning fossil fuels and raising countless billions of farm animals have put so much heat-trapping, ocean-acidifying gas into the atmosphere that the planet is overwhelmed. Join us on Twitter and Facebook But in …