Energy

Calif. Law To Require Ships To Cut Pollution

California is about to become the first state to require shore power at its ports. A new law mandates at least half of a shipping line's fleet to shut down their diesel engines and plug into shore-side electric power when they unload their cargo. It's part of a larger effort to cut pollution at the state's busiest ports, but costs have been a sticking point.

Is The Sky The Limit For Wind Power?

Building huge turbine farms too close together might significantly reduce their power, some atmospheric scientists say. The problem is "wind shadow" — the turbulence created by one big cluster of turbines that steals wind from another cluster down the road.