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.
Users of athletic fields, parks, and playgrounds with artificial turf may face risks from dozens of potentially harmful synthetic chemicals in the ground-up recycled tires used to make it.