Complex sentence: AB 32 facilitated the passage of a cap-and-trade program in 2010 which placed an upper limit on the greenhouse gas levels emitted by the state and set the environmental context by which SB 375 came into being.
Split into simpler sentences: AB 32 facilitated the passage of a cap-and-trade program in 2010 which placed an upper limit on the greenhouse gas levels emitted by the state. Additionally, AB 32 also set the environmental context by which SB 375 came into being.