WASHINGTON — The Senate on Tuesday gave final approval to an overhaul of the nation’s 40-year-old law governing the use of toxic chemicals in homes and businesses, sending the bill to President Oba

OTTAWA — The amount of pollution created by vapor from Canada’s oil sands, which contributes to climate change, ranks on par with most major cities in North America, according to a new study by the

HOUSTON — Exxon Mobil has been under pressure for over a year to explain its handling of climate change issues in the past.

MEXICO CITY — Mexico City authorities have lifted a smog alert one day after ozone levels rose above 150 percent of acceptable limits.

MIAMI — The large-scale dredging of Miami’s port to accommodate the newest generation of freighters, an undertaking that prompted a long-running battle with environmentalists, caused widespread dam

It has been the hottest year to date, with January, February and March each passing marks set in 2015, according to new data from the National Oceanic and Atmospheric Administration.

The world’s farmers have increased their use of genetically modified crops steadily and sharply since the technology became broadly commercialized in 1996. Not anymore.

ISLAMABAD, Pakistan — A powerful earthquake rattled parts of Pakistan, India and Afghanistan on Sunday, shaking buildings and houses and causing panic in several cities.

With global temperatures rising inexorably, some scientists and national security theorists have pondered cooling things down by tinkering mechanically with the planet’s climate.

BEIJING — A year and a half ago, negotiators from the United States persuaded the Chinese government to commit to a deadline for reversing the growth in greenhouse gas emissions from China.