Regulations and a natural gas boom have helped reduce America's CO2 emissions to their lowest level since 1994. But CO2, and plenty of other toxic particles, continue to pollute our urban air. Brentin Mock looks at 5 highly polluted urban areas.

"It’s not news that large polluting factories are often concentrated in communities where people of color and of low-income are the primary, if not the exclusive inhabitants. But an EPA report released last week drives this point home. The report, which documents greenhouse gas emissions from large facilities in 2012, is accompanied by interactive maps showing where those facilities are located (at least the ones that actually report to the EPA)."
"Looking at those maps, I located five of the nation’s worst areas where waste processing plants, refineries, and power plants are bundled — much to the detriment of families living close by," writes Mock.
FULL STORY: 5 highly polluted urban areas you don’t want to live if you can help it

National Parks Layoffs Will Cause Communities to Lose Billions
Thousands of essential park workers were laid off this week, just before the busy spring break season.

Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50
A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.

Delivering for America Plan Will Downgrade Mail Service in at Least 49.5 Percent of Zip Codes
Republican and Democrat lawmakers criticize the plan for its disproportionate negative impact on rural communities.

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Balancing Bombs and Butterflies: How the National Guard Protects a Rare Species
The National Guard at Fort Indiantown Gap uses GIS technology and land management strategies to balance military training with conservation efforts, ensuring the survival of the rare eastern regal fritillary butterfly.
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Mpact (formerly Rail~Volution)
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research
NYU Wagner Graduate School of Public Service