31 Dec 2012:
Network of Smartphone-Based
Sensors Track Air Pollution Levels
Researchers at the University of California, San Diego have developed a network of smartphone-based air pollution monitors
that allow individuals to track pollution levels in real time and feed a central
database of air quality trends citywide throughout the day. The so-called CitySense devices are equipped with sensors that measure ozone, nitrogen dioxide, and carbon monoxide, and a digital app that illustrates the color-coded results based on the U.S. Environmental Protection Agency’s air quality ratings. During a four-week test, in which the phones were distributed to 30 volunteers, the system showed hotspots of elevated pollution that shifted over the course of the day. Ultimately, the developers hope to deploy hundreds of devices in order to generate a public database on air quality levels. “We want more data and better data, which we can provide to the public,” said William Griswold, a computer science professor at UC San Diego. “We are making the invisible visible.”
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Yale Environment 360
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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.