Energy and Global Warming News for August 12: LED bulb edges below $20; For parched farmers, a crop of electrons; Iceland looks to electric cars as hydrogen stalls

LED Bulb Edges Below $20

This week, Home Depot fired a new marketing salvo in what is expected to be a broader national effort to get home customers to adopt LED lighting.

The retail giant began selling one of the light bulbs in its highly energy-efficient lineup at a surprisingly affordable price of just under $20 online. Bricks-and-mortar stores will follow in September.

While $20 hardly sounds like a deal at first blush, such bulbs are expected to last as long as 30 years. Not long ago...