Union of Concerned Scientists
JUNE 6, 2023
Older vehicles (pre-2004) make up 19% of the state’s passenger vehicles and only 12% of miles driven, yet they emit almost 3 times as much smog-forming, nitrogen-oxide pollution as all 2004 and later vehicles combined. These pollutants react in the atmosphere to form harmful particulate matter pollution known as PM 2.5.
Union of Concerned Scientists
FEBRUARY 9, 2024
Responsible for 12 percent of all US global warming emissions from human activities, methane traps significantly more heat per molecule than carbon dioxide, making it 86 times more harmful for the first 20 years after it is released into the atmosphere. First, there’s air pollution.
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Union of Concerned Scientists
MAY 13, 2024
come from reactions of industrial pollutants (nitrogen oxides and sulfur oxides) with sunlight and unfinished fuel combustion. Ozone plays a dual role in our atmosphere. Coarse particles (PM10, that is particulate matter that is 10 micrometers or less) include dust and pollen, fine particles (PM2.5)
Enviromental Defense
OCTOBER 12, 2023
Given its tiny size, it is very hard to keep hydrogen from leaking into the atmosphere. So called “Blue Hydrogen”—Hydrogen from natural gas with carbon capture— is even worse for the climate than burning coal or natural gas given the methane leakage and extra fuel needed to power the CCUS technology.
Union of Concerned Scientists
NOVEMBER 16, 2022
of the observed rise in atmospheric carbon dioxide and 52 percent of the rise in global average temperatures between 1880 and 2015. The technology to keep the planet under 1.5 Updated analysis from 2020 shows that emissions traced to the 88 largest carbon producers contributed approximately 60 percent?of degree C target within reach.
Union of Concerned Scientists
NOVEMBER 30, 2023
Reducing fossil fuel pollution leads to fewer deaths and more healthcare savings UCS found that decarbonization policies result in a decline in key pollutants such as PM 2.5 , nitrogen oxides, and sulfur oxides. Source: UCS.
Union of Concerned Scientists
JULY 3, 2022
This decision wrongfully precludes the agency’s authority to set robust power plant carbon pollution standards in line with today’s technologies and practices adopted on a sector-wide basis. Atmospheric concentrations of heat-trapping emissions are on a relentless upward trajectory , as is the increase in global average temperatures.
Expert insights. Personalized for you.
194 
Let's personalize your content