The Lancet

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.

Consumption of healthy foods such as fruits and vegetables improved worldwide over the two decades ending in 2010, but "intake of unhealthy foods including processed meat and sweetened drinks" rose more rapidly, according to a study published in the journal Lancet Global Health.