Air pollution science under siege at US environment agency
Top EPA adviser attacks agency decision-making ahead of major review of air pollution standards.
A quarter of a century of research has shown that breathing in fine airborne particles emitted by cars, power plants and other sources shortens people’s lifespans. But that scientific consensus is now under attack from a top adviser to the US Environmental Protection Agency (EPA), just as the agency is rushing to revise the national air-quality standard for such pollution before the end of President Donald Trump’s first term. Scientists fear that the result could be weaker rules on air pollution that are bad for public health — and based on politics, not science.
The national air quality standards are designed to limit the amount of six widespread pollutants — including airborne particles and ozone — that are present in the air that people breathe. State and local governments must develop plans to curb pollution in areas that do not meet the standards. The EPA must review the science, and if necessary, revise the standard for each pollutant every five years, though in practice the process often takes longer.
By: Jeff Tollefson/Nature News