Pollution

Wildfires burning on Sumatra have sent a choking haze over Singapore.

Chemicals found in air pollution may be a risk factor for autism.

Increase in dust storms isn't just in Western residents' imagination.

Aerosols shifted tropical rainfall southward, devastating Central Africa.

Coal plant waste product can be converted into oil spill cleanup prodigy and then recycled, making the oil usable as well.

Plastic, metal and other trash discovered in California and Oregon's deep ocean canyons.

Plastic bottles and metal cans clutter deep ocean canyons.

Study also confirms ozone is declining, thanks to stricter vehicle emissions standards.

Some ozone is good and protects us from the sun, but ground-level ozone is bad for our health.

Environmental stressors can turn on cells' genes when they're supposed to be off.

Everyone has low levels of these chemicals in the body, scientists say.

Time spent in traffic accounted for the most heart attacks, the study said.

For heart attack survivors, living close to a roadway may be hazardous for health, a new study suggests.

Exposure to air pollution in the womb may increase a child's risk of obesity.

Sensor-on-a-chip holds potential for monitory ecosystem and human health.

Study finds defects in fish contaminated by the 2010 BP spill.

Have dense forests become an environmental hazard?

Cutting carbon dioxide isn't the only way to stop climate change.

Watch where you swim — more than half of U.S. waterways are now polluted.