29 Aug 2014:
New Database Tracks Ecological
Health Impacts of Dams on World's Rivers
A newly launched online database
illustrates the impacts of nearly 6,000 dams on the world's 50 major river basins, ranking their ecological health according to indicators of river fragmentation, water quality, and biodiversity. The "State of the World's Rivers" project was developed by the advocacy organization International Rivers
and created using Google Earth. Users can compare the health of individual river basins, see the locations of existing and planned dams, and explore 10 of the most significant river basins in more depth. For example, as this map of China's Yangtze basin shows, at least 374 dams already exist in the basin, and at least another 167 are under construction or planned to be built. The ecological health of the region
is showing signs of collapse, the database entry says: A 2014 study
found that fish species in the Yangtze drastically decreased from 143 to 17 over the course of one year, due to overfishing and dam construction. The 6,000 dams represented in the database are a small percentage of the more than 50,000 large dams that impact the world's rivers, the organization notes.
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Yale School of Forestry
& Environmental Studies
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.