Arun Majumdar, the director of Advanced Research Projects Agency-Energy, lays out the audacious goals and the tough budgetary realities of the U.S. Department of Energy unit that's best known by its acronym ARPA-E. Read More

When surveying executives about their top priorities for the year, sustainability falls way, way down the list. But there's a lot more to the story of how and why companies are embracing green initatives. Read More

Eben Bayer, the co-founder and CEO of Ecovative Design, extols the natural processes and properties of grass and cows as a way of thinking about the design of environmentally responsible products. Read More

Despite the well-trod cliché that a journey to sustainability is a marathon and not a sprint, Nike, with its Considered design ethos, shows all the signs of being in it for the long haul. Read More

 EcoATM has received investment from Coinstar and a grant from the National Science Foundation to advance its kiosks that buy used electronics from consumers. Read More

The furniture giant's planned development would create 70 gigawatt-hours of electricity by next year, and will power 17 IKEA stores throughout Sweden. Read More

As head of the Carbon War Room, Jigar Shah has a gigaton-sized challenge ahead of him; and though he's plenty frustrated at the slow pace of progress to date, but sees some rays of light in getting business on board with major emissions-reduction efforts. Read More

Philips Lighting's LED replacement for 60-watt incandescent bulbs has become the first to qualify for an Energy Star rating. With a list price of $39.97 at Home Depot it is considered an efficient and, quite possibly, a cost-effective alternative to the traditional bulb. Here's how the math pencils out. Read More

A steady parade of innovators in large and small companies have tried to create more environmentally benign alternatives to plastic; after decades of slow progress, bioplastics are sprouting like weeds. Read More

 A major railroad in the United States has signed up to buy $15 million worth of recycled plastic railroad ties over the coming years. Read More