Martin Weitzman: 1942 - 2019

Here is his Wikipedia page: https://en.wikipedia.org/wiki/Martin_Weitzman.

And here is Rob Stavins on twitter:

It is painful for me to convey the sad news that my Harvard colleague, mentor, and friend, Marty Weitzman, died unexpectedly yesterday. Many tributes will be forthcoming, but as a memory for now, here is a related essay I wrote last year: https://t.co/mdfXvCi7tN

— Robert N. Stavins (@RobertStavins) August 28, 2019

Here are a few old posts:

1. EconTalk Podcast: Martin Weitzman on Climate Change 
2. Weitzman on climate change
3. Two economists walk into a bar

He is the top-ranked author in the field of environmental economics: https://ideas.repec.org/top/top.env.html#authors