Conversation so far:
How is Jack Johnson involved in Charity ?
Johnson and his wife Kim created the Johnson Ohana Charitable Foundation, a non-profit public charity supporting environmental.
Did he donate any money to charity ?
2012, Jack donated $50,000 for Hurricane Sandy relief and added links on his website for others to donate.

Question: Did he help raise any money for other catastrophes ?
Self-contained rewrite: Did Jack Johnson help raise any money for other catastrophes besides Hurricane Sandy?