Not sure Google did this. Google would link to a site. That site might have falsified the founders list, but Google wouldn’t be responsible for that. If Google blocked a search, that would be a different matter.
They have some scrubbing work to do, though - the Greenpeace website has a picture captioned "In 1971, motivated by their vision of a green and peaceful world, a small team of activists set sail from Vancouver, Canada, in an old fishing boat. These activists, the founders of Greenpeace, believed a few individuals could make a difference."
Searching the picture with Goolag, you can get a Canada.com website that identifies these "Founders of Greenpeace" by name.
Patrick Moore is still one of them. :-)
If you do the search now, near the top is a tweet from Patrick Moore saying it was because Wikipedia was edited.