Linda Poon

The one-in-100-year storm that hit our nation's capital last week is expected to become a one-in-25-year event by mid-century, according to D.C.'s own analysis.

What prevents cities from adopting electric buses en masse is a mix of technological, financial, and institutional challenges, according to a pair of reports from the World Resource Institute looking at efforts in 16 cities at various stages of adopting e-buses.

Customs data collected by the American agency show that the U.S. received 2.9 million Chinese visitors in 2018, down 5.7 percent from the year before.

The #trashtag challenge inspired people to clean up beaches, parks, rivers, or just random trash strewn on the street.

The small city set a new national precedent in the fight against chlorofluorocarbons, or CFCs, which caused major danger to the atmosphere.

As severe storms become more frequent and temperatures rise, public-health experts are concerned about the increased potential for transmission of vector-born illnesses like Zika and West Nile.

Both companies have made big commitments to prove their eco-friendliness, but there's still debate over whether they will put the environment ahead of their bottom lines.

Buildings account for roughly 50 percent of a city's total carbon emissions, and 70 percent in major cities like London, Los Angeles, and Paris.

In South Korea's high-tech metropolis, human connections are few and far between.

Many issues are exacerbated by light pollution, and new research suggests the spread of West Nile virus may be another one.

Residents can get up to $75,000 to build a "granny flat"—if they open it up to a homeless family.