A lack of tree cover in low-income areas has left many residents especially vulnerable to rising heat. It's a legacy of the city's design—and its history of racist policies.
The polar blast in Texas earlier this year revealed a dirty secret in the most prolific U.S. oil field: Two under-the-radar natural gas plants that are a persistent source of pollution.
Ozone, a gas and harmful air pollutant is created by volatile organic compounds when pollutants are emitted by cars, power plants and other industrial facilities.
