Quality, quantity of key crops imperiled by human impact

Changing environmental conditions around the world "could negatively impact the health of millions of people by altering the amount and quality of key crops," according to two studies from the Harvard School of Public Health.

U.S. eating habits are poor but better than in 1999

Americans score poorly when assessed for a healthy diet, says a study published in JAMA Internal Medicine. Researchers say the U.S. average improved to 46.8 in 2010 from the initial 39.9 in 1999 on a scale of 110. More than half of the improvement came from lower consumption of trans fats. The 29,124 adults in the study also ate more whole fruit, whole grains, and legumes and nuts while cutting back on sugary beverages.