a proud earth day

Los Angeles embarked on one of its most ambitious projects to combat global warming on Monday, becoming the biggest city in the nation to impose "green" building rules that would potentially cut millions of tons of pollution over the next decade.

In a unanimous vote, the City Council passed an ordinance requiring builders of large commercial and residential developments to adopt such measures as planting drought- resistant landscaping and using recycled materials and energy-efficient heating, cooling and lighting.