Conversation so far:
What is Paul Watson's biggest environmental achievement?
Watson was a field correspondent for Defenders of Wildlife from 1976 to 1980 and a field representative for the Fund for Animals from 1978 to 1981.
What else did he achieve environmentally?
Watson also was a co-founder of Friends of the Wolf and Earthforce Environmental Society.
Did he achieve anything else environmentally?
According to The New Yorker, Watson revived the 19th-century practice of tree spiking.

Question: Can you tell me about any further achievements environmentally?
Self-contained rewrite: Can you tell me about any further achievements environmentally that Paul Watson received?