The data set shows 2010 emissions of carbon dioxide, methane, and other greenhouse gases from more than 6,700 of the largest sources in the U.S., including large industrial facilities and suppliers of certain fossil fuels and industrial gases.
The rule will require Ameren and other electricity companies to reduce emissions of toxic pollutants like mercury and arsenic, which can cause developmental effects, cancer, asthma, and other serious health problems.
The Environmental Protection Agency has announced new limits on air pollution from coal-fired power plants. The rule aims to lower emissions from power plants in 27 states including Missouri and Illinois.
The goal is to reduce soot (fine particulates) and smog (ground-level ozone) and improve air quality downwind. (Check out this map from the EPA, a preview of which is above, to see how the new limits affect your state).
It's getting warmer in St. Louis and that means the issue of the region's air quality returns to the forefront.
Historically, the area has had pretty poor ozone levels. (Ozone is the main ingredient of urban smog that can be a significant health hazard, particularly for children with asthma.) Susannah Fuchs with the American Lung Association says the region’s air quality has gotten better but it still needs work.