Conversation so far:
What public service did Joe Walsh involve himself in?
Walsh's love of Santa Cruz Island grew into a lifelong commitment to conserve the environment there. He is President of the Santa Cruz Island Foundation
When did Joe Walsh start advocating to conserve the environment in santa cruz island?
In 1980
Are there any other interesting aspects about the Joe Walsh  article?
Joe Walsh is active in charity work and has performed in a number of concerts to raise money for charitable causes
Did Joe walsh work with anyone of note within these charities?
Zac Brown Band, Gary Clark Jr., Keith Urban

Question: Why did he contact them?
Self-contained rewrite: Why did Joe Walsh contact Zac Brown Band, Gary Clark Jr., Keith Urban?