A new study from the University of Surrey produced counterintuitive results about the relative pollution levels of commuters around London.

"If you find yourself wheezing as you wander down a fume-filled London street, just remember that things could be worse," writes Feargus O'Sullivan. "You could be on the city’s subway system."
"According to a new study from the University of Surrey, London’s Tube riders experience worse air than those who travel by car," adds O'Sullivan. "In the worst cases, particulate levels in the subway system can be as much as eight times higher than those experienced by drivers."
The culprit of the pollution issue in the London Subway isn't the motor or exhaust of the trains—it's from "mechanical abrasion between rails, wheels and brakes."
O'Sullivan provides a lot more detail and context for the study, including listing two big lessons to takeaway.
FULL STORY: London's Subway Commuters Breathe More Pollution Than Drivers

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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