Tuesday, March 29, 2011

Artificial Leaf Design Stable, Uses Inexpensive Components.

The Wired (3/28, Brown) "Wired Science" blog reports "MIT professor Daniel Nocera claims to have created an artificial leaf made from stable and inexpensive materials that mimics nature's photosynthesis process." The artificial leaf is "no bigger than a typical playing card, which is left floating in a pool of water" and "uses sunlight to split the water into its two core components, oxygen and hydrogen, which are stored in a fuel cell." Wired notes, "Nocera's leaf is stable - operating continuously for at least 45 hours without a drop in activity in preliminary tests - and made of widely available, inexpensive materials." It is also substantially more efficient than a natural leaf at harvesting energy from the sun.
        Popular Science (3/28, Dillow) notes, "The Nocera Lab's artificial leaf, it should be noted, isn't the first working attempt at recreating photosynthesis in artificial materials." However, "previous attempts have led to artificial leaves full of unstable materials that are expensive and lead to short life spans."

Wednesday, March 9, 2011

Nation's Capital Leads US Cities, States In Green Building.



USA Today (3/9, Koch) reports, "The nation's capital isn't just the epicenter of the US government, it also leads US cities and states in green building," according to the US Green Building Council. "The Obama administration requires new federal buildings meet higher energy-efficiency standards, and one result is that Washington now has far more green-building space per capita -- 25 square feet -- than any of the 50 states." The article notes that the states with the most LEED-certified buildings are not the same as those with the highest per capita LEED ratings. "Using per capita, vs. the more traditional numbers of projects, or pure square footage, is a reminder to all of us that the people who live and work, learn and play in buildings should be what we care about most," said Scott Horst, LEED's senior vice president.