The Earth Institute will offer nine research assistant opportunities for undergraduate students during the Spring 2016 semester.

Looking at regional differences in PM2.5 concentrations gives us a sense of the changing face of air quality throughout the world.

A new study shows that ozone pollution in the western United States can be increased by La Niña, a natural weather cycle at the surface of the Pacific Ocean. The finding is the first to show that the La Nina-El Nino cycles directly affects pollution.

While not all countries have the financial wherewithal and capacity to deploy ground-based instruments for air-quality monitoring, and for some countries monitoring information is not available to the public, for example, through health advisories, another way exists to assess air pollution levels: through satellites.