<p>State hopes to pave way with emissions law Davis says the 'greenhouse gas' bill to be signed today is an 'example for others to follow' By Chris Bowman -- Bee Staff Writer Published 2:15 a.m. PDT Monday, July 22, 2002 Gov. Gray Davis today plans to sign a bill making California the first state to regulate vehicle exhausts linked to global warming -- atmospheric change that threatens to shrink water supplies, raise sea levels and worsen wildfires.</p>