"Plane powered entirely by the sun lands safely in Switzerland after completing its first 24-hour test flight, proving that aircraft can stay airborne during the night using energy gathered from the sun by day."

"Earlier this month, when Ikea announced this will be its last year selling incandescent light bulbs, the retailer billed it as an early, pro-sustainability move before federal law 'bans' the famously inefficient lamps."

"It is not easy to reinvent the wheel, but researchers at the Massachusetts Institute of Technology are giving it their best shot."

"Ordinary office paper coated with an inky layer of carbon nanotubes or nanowires can make a lightweight, flexible and highly conductive battery or superconductor, according to Stanford University researchers."

"The Obama administration vowed today to streamline the patent review process for 'green' technologies and committed $100 million for federal research, development and demonstration projects."

"The federal Energy Department will make good on a pledge for a bolder technology strategy on Monday, awarding research grants for ideas like bacteria that will make gasoline, enzymes that will capture carbon dioxide to counter global warming and batteries so cheap that they will allow the use of solar power all night long."

"A tidy village dedicated to the future of green, solar-powered living has taken over the heart of the National Mall, where 20 teams of college students are vying to see who can build the most appealing energy-efficient home."

"Dow Chemical has unveiled a residential roof shingle in the form of a solar panel designed to be integrated into asphalt-tiled roofs."

"The Environmental Protection Agency detailed its plans on Tuesday for research into the possible health and environmental risks of nanomaterials, tiny substances that are finding growing use in products like sunscreens and industrial adhesives."

Straw, a century-old building material, is making a comeback as an eco-friendly choice for modern home construction.

"Green roofs are increasing in popularity across the US, especially in cities, where there's not a lot of space for gardens. In Washington, DC, the city government is promoting the practice for its environmental benefits."

NASA is taking water recycling -- something necessary for space travel -- to new heights.