California's ballot-initiative process has roiled that state for 100 years. Legislators are now proposing reforms to bring it under control.
California's 2008 law to limit greenhouse-gas emissions is seen as Gov. Arnold Schwarzenegger's biggest achievement. If it is undone by Proposition 23, other similar laws could follow, experts say.
The court must rule in 90 days on the legality of Proposition 8, which bans same-sex marriage.
More than 150 ballot initiatives – on issues from gay marriage to renewable energy – were decided Tuesday.