For example, between 1990 and 2014, U.S. refiners spent $ 154.4 billion on environmental protection technology, which has led to cleaner burning fuels that reduce the emission of criteria air pollutants.» (energytomorrow.org)
Our operations track and record criteria air pollutant emissions, including NOx (Nitrogen oxides), SO2 (Sulfur dioxide), CO (Carbon monoxide) and PM (particulate matter). (2014csr.hormelfoods.com)
The fact is that even while production has significantly increased, total criteria air pollutants and greenhouse gas emissions have fallen simultaneously, in large part due to industry's commitment to environmental protection and the expanded use of abundant, affordable natural gas in electricity generation. (api.org)