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What is phase shift keying? Describe how it works.
Massachusetts v. EPA
A landmark Supreme Court case in which Massachusetts sued the Environmental Protection Agency for failing to regulate carbon dioxide and other greenhouse gases as pollutants.
Vehicle Emission Standards
Regulations that set specific limits on the amount and type of pollutants that can be emitted by vehicles to reduce air pollution.
Greenhouse Gasses
Gaseous compounds in the Earth's atmosphere that trap heat, contributing to the greenhouse effect and global warming.
Pollutant
A substance that contaminates the environment, causing harm or discomfort to organisms.
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