In reply to Tomas M..

I would have not brought it up if author published the theme on his personal website, but in this case he created new website centered on the Sustainability of WP - very specific subject.

The fact that he works at Automattic gives to this even more weight.

I understand that there is a debate going on on the issue of climate change, and if he wants do go into that debate, he could, but in a constructive manner, not going ad hominem route...

If you want to do something good for the community, act by showing good example, especially if you're officially involved in the company that oversees the WP development.