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The longest continuously monitored methane emissions record shows how market forces and oilfield practices can impact greenhouse gas emissions.

One train-mounted air quality sensor can cover the same area as 30 stationary sensors.

Using data from NASA’s Orbiting Carbon Observatory-2, researchers found connections between the population density of cities and how much carbon dioxide they produce per person.

A new study could help improve air quality in Salt Lake City and other cities across the U.S. West.