keywords: emissions california vehicles states autos
text: California OKs Toughest Auto Emissions Rules By TIM MOLLOY     LOS ANGELES (AP) -- California has adopted the world's first rules to reduce greenhouse emissions for autos, taking what supporters see as a dramatic step toward cleaning up the environment but also ensuring higher costs for drivers.    The rules may lead to sweeping changes in vehicles nationwide, especially if other states opt to follow California's example...