Complex sentence: Browne was one of the leaders of the anti-nuclear movement and founded Musicians United for Safe Energy with Bonnie Raitt in 1979, and was an active member of the Abalone Alliance and Alliance for Survival.
Split into simpler sentences: Browne was one of the leaders of the anti-nuclear movement and founded Musicians United for Safe Energy with Bonnie Raitt in 1979. He was also an active member of the Abalone Alliance and the Alliance for Survival.