How an online data collection program has changed the way we track disease.

In his persistent campaign to make New Yorkers healthier, Mayor Bloomberg wants people to take the stairs instead of the elevator.

Washington State tries to balance public health, tax revenues and driving the black market out of business as it licenses retailers to sell recreational marijuana.

If the folks behind the Great American Smokeout have their way, the latest frontier in the “no smoking” crusade could be apartment buildings.

Three days of extreme heat in Chicago in 1995 caused over 700 deaths. New York University professor Eric Klinenberg talks about what we've learned from that catastrophe.

Republicans want to use money for preventive care to cover lower interest rates

Apple remains tight-lipped as its Chinese suppliers reportedly pollute and break environmental laws. Activists hope that putting pressure on the big brand will impact other Chinese polluters.