Palm Springs, California-- Honda is about to ask environmentalists, "How green is your wallet?" Its 2003 Civic Hybrid will serve as gasoline-and-electric propulsion's acid test. The Civic marches past Honda's first hybrid, the Insight, in almost every area except its near-$20,000 base price. It brings to Honda's green party a new 1.3-liter four-cylinder engine, a lighter and more compact battery-and-electronics pack, two more doors, and a back seat. And it looks like a regular car, unlike the awkward Toyota Prius.