Mayor Phil Gordin's outline - an ambitious strategy to make Phoenix the first carbon-neutral city - and the greenest - in the entire country.

Green Phoenix, a 17-point plan developed in collaboration with Arizona State University's Global Institute of Sustainability, would require about $1 billion in water, renewable energy, public-transit and other investments.

Gordon is turning to President Barack Obama's economic-stimulus package for help, though he doesn't expect to receive funding for every goal.

The mayor's proposal, if fully implemented, would cut city-generated greenhouse-gas emissions by roughly 70 percent, or 430,000 metric tons a year, the equivalent of taking 80,000 vehicles off the road, based on one estimate.

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