"Smoke and ash from massive wildfires in the American West clouded the sky and led to air quality alerts Wednesday on parts of the East Coast as the effects of the blazes were felt 2,500 miles (4,023 kilometers) away."

"Wildfires raging across the western United States and Canada, including a “monster” two-week-old blaze in Oregon, on Tuesday belched smoke and soot that gusted eastward and caused harmful air pollution as far away as New York City."

"New research, using machine learning, helps project how the buildup of greenhouse gases will change clouds in ways that further heat the planet."

"Scientists know that global warming is changing clouds, but they haven’t been sure whether those changes would heat or cool the planet overall.

"Unrelenting heat waves are boiling cities across the U.S. this summer, spiking ozone pollution levels and threatening the fighting power of air quality safeguards."

"The European Commission has fined Volkswagen Group and BMW $1 billion for colluding with Daimler to hold back the development of technology that could have reduced harmful emissions from their vehicles."

"Boxed in by refineries, oil tanks, an interstate highway and a bridge under construction, the people are left in a hollowed-out neighborhood and a broken community."

"The receding water is affecting wildlife and could send arsenic-laced dust into the air that millions breathe".

"The petroleum smell is gone, the benzene emissions have abated and residents in nearby neighborhoods of color feel they’re finally being heard."

"President Biden has a two-step strategy to cut tailpipe emissions, the nation’s largest source of greenhouse gases: First, restore the standards to roughly the level set by President Barack Obama. Then, tighten them even further, with an aim of making the electric car the dominant vehicle sold in the United States."

"High levels of a cancer-causing chemical have been detected in air monitors in Houston neighborhoods near the busiest U.S. petrochemical port, according to a report issued on Thursday by Houston health officials and environmental groups."