11 Apr 2012:
NASA Biofuel Algae
Grown Inside Floating Plastic Bags
NASA has developed a system capable of growing large amounts of algae for biofuel production within a network of floating plastic bags
, an innovation its developers say could ultimately produce a new fuel source. By pumping wastewater and carbon dioxide into four nine-meter plastic bags at a demonstration plant in California, researchers have shown that the system can grow enough algae to produce nearly 2,000 gallons of fuel per year under ideal conditions, according to a report in MIT’s Technology Review
. If built near wastewater plants, the technology would overcome two of the challenges associated with large-scale algae biofarms — access to huge amounts of fertilizer and large areas of land. One significant challenge, however, is that the technology currently would require an enormous amount of plastic. For instance, a scenario capable of producing 2.4 million gallons of algae per year would also require five square kilometers of plastic bags, which would likely have to be replaced annually.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.