Following Friday’s youth-led climate strike — the largest-ever global protest focused on climate — we speak with Bill McKibben, longtime journalist and co-founder of 350.org. McKibben’s latest piece for The New Yorker is titled “Money Is the Oxygen on Which the Fire of Global Warming Burns,” and his cover piece for Time magazine is headlined “Hello from the Year 2050. We Avoided the Worst of Climate Change — But Everything Is Different.” McKibben’s 1989 book, “The End of Nature,” was the first book for a general audience about climate change.