Academy of Natural Sciences
SEPTEMBER 1, 2021
There are many human-made sources of emissions, and on-road motor vehicles, such as cars, are a huge driving factor in air pollution. Motor vehicle exhaust is one big source of ground-level ozone or smog, fine particulate matter, carbon monoxide and nitrogen dioxide.
ESA
JUNE 14, 2021
The Biden administration laid out its timeline for rolling back major Trump environmental rules, but acknowledged that the process of enacting more protective regulations on climate and air pollution and drinking water will take years — if they can estimate the timeline at all.
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