When trees are cut down, their stored carbons are released into the atmosphere, accounting for 10% of warming emissions worldwide, according to the Union of Concerned Scientists.

Closer to the ground, ozone can also be created by photochemical reactions between the sun and pollution from vehicle emissions and other sources, forming harmful smog.

Yale has asked supervisors of its investments not to invest in companies that do not work to reduce gas emissions. But, student activists want a clean break.

Algeria needs to reduce its greenhouse emissions.

Positron Emission Tomography uses a radioactive tracer to visualize metabolic activity within the human body.

Greenhouse gas emissions from human activities are the only factors that can account for the observed warming over the last century; there are no credible alternative human or natural explanations supported by the observational evidence.

Volkswagen used illegal software that detects when the car is undergoing official emissions testing.

U.S. President Joe Biden signed an executive order Thursday calling for new automobile emissions standards and setting a goal of having half of new vehicles sold in the United States be electric by 2030.

To be absolutely sure the Solar Probe Cup would withstand the harsh environment, the Odeillo Solar Furnace—which concentrates the heat of the Sun through 10,000 adjustable mirrors—was used to test the cup against the intense solar emission.

Filters stop emission of gas into the atmosphere.