07 Apr 2015:
Nationwide Vehicle Emissions
Database Could Help Cities Curb CO2
Nationwide CO2 emissions from vehicle travel
Researchers at Boston University have created a nationwide database
for determining how much carbon dioxide is produced by vehicle travel in U.S. cities and suburbs — an essential part of greenhouse gas reduction efforts, they say. Encompassing 33 years of data, the system provides kilometer-by-kilometer views of vehicle emission trends from roads across the country. Those emissions account for 28 percent of all fossil fuel CO2 emissions in the U.S., the researchers note. The data highlight the ongoing shift in the U.S. toward urban traffic and emissions. For example, cities have been responsible for 80 percent of the growth in vehicle CO2 emissions since 1980 and for 63 percent of total vehicle CO2 in 2012. Emission levels and trends can vary dramatically across different cities, however. Population density hasn't changed much in Salt Lake City since the 1980s, for instance, but the per-capita emissions have soared because the suburb and exurb populations are growing, the data indicate. "For metropolitan areas that want to address CO2 emissions from their regional economy, knowing where they are is a prerequisite to doing anything about it," lead author Conor Gately said. "You can't affect what you can't measure."
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
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.