Conversation so far:
What charities did Joe Walsh work with?
Joe Walsh is active in charity work and has performed in a number of concerts to raise money for charitable causes.
What does Joe Walsh do to help conserve the environment in Santa Cruz?
Joe Walsh's love of Santa Cruz Island grew into a lifelong commitment to conserve the environment there, and he has been active in preserving the island's parks.

Question: What other charities is he involved with?
Self-contained rewrite: What other charities is Joe Walsh involved with besides Santa Cruz Island conservation and performing in a number of concerts to raise money for charitable causes?