Green news harvest: Tapping electricity in trees, solar-coated steel

Also: photovoltaic coatings for steel; wildfire warning systems to harness electricity from trees; fluorescent lightbulbs less green in some regions; record funding for green start-ups.

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We pummel the powder in Nissan's Winter Warrior concepts

Equipped with suspension lifts and actual tracks, these concepts are meant to reach places that no ordinary vehicle can.

by Jon Wong