The CDC says the drop is spurred by higher prices, smoke-free policies and anti-smoking campaigns.
Plans may prove disastrous for billions, but might be required for the good of the planet.
The CDC reports that only 30% of Americans with HIV have their conditions under control.
Urban agriculture is playing an increasingly important role in global food security, a study has suggested.
South Korea-based fund aims to help nations invest in clean energy and green technology.
Global warming will significantly increase the frequency of lightning strikes, according to U.S. research.
China and the US have unveiled new targets on greenhouse gas emissions at talks in Beijing.
The Overseas Development Institute says G20 nations spent almost $90B a year finding oil, gas and coal.
The worldwide cost of obesity is about the same as smoking or armed conflict, research suggests.
Whether it be starvation or obesity, the group says international commitment is needed.
A study warns that children have been at risk of poisoning since the issuance of laundry detergent pods in 2012.
A panel recommends that cannabis-laced food that is attractive to children be banned.
Highly contagious strain of bird flu was discovered at a poultry farm in the Netherlands.
Doctors Without Borders will begin testing three therapies in West Africa.
Certain hypertension medication is associated with reduced risk of developing Lou Gehrig's disease.
Amgen's drug did not significantly improve overall survival rates.
Talk therapy is increasingly looked to as a solution over medication for preventing suicide.
A U.S. federal study shows that heavy drinking is not necessarily a sign of alcoholism.
Scientists estimate that Jupiter's famous red spot is a sunburn.
Premature babies are treated in environments that contain unsafe chemicals.