In 2006, the United Nations Environment Program (UNEP) started the billion trees campaign with the goal of planting — you guessed it — one billion trees around the world. Plant for the Planet, which inherited the campaign, wanted to know
A new study out of the Yale School of Forestry estimates that there are more than three trillion trees in the world. This represents a seven-fold increase over previous estimates.
Contrary to the first hypothesis about the increased prevalence of obesity and type two diabetes, humans did not evolve to increase fat storage. More likely, the recent rise in metabolic diseases results from epigenetic factors and the gut microbiome.
Despite the large variability of air quality throughout a city, most cities can only collect air quality data from a couple of sites, leading to a misrepresentation of air quality. A team of undergraduates led by Yale professor Drew Gentner
