Union of Concerned Scientists

Union of Concerned Scientists (UCS) reported Scope 3 emissions of about 828,000 kg CO2e in 2020. These Scope 3 emissions primarily comprised business travel at 157,000 kg CO2e and employee commute at 70,000 kg CO2e. In 2019, the organisation's Scope 3 emissions were approximately 1,218,000 kg CO2e, including 388,000 kg CO2e from business travel and 140,000 kg CO2e from employee commute.

Earlier data indicates Scope 1 and 2 emissions were reported in 2013 and 2012. In 2013, total reported emissions were about 922,000 kg CO2e, with Scope 1 stationary combustion at 253,000 kg CO2e and Scope 2 purchased electricity at 188,000 kg CO2e. In 2012, total reported emissions were around 946,000 kg CO2e, with Scope 1 stationary combustion at 246,000 kg CO2e and Scope 2 purchased electricity at 200,000 kg CO2e.

UCS has set several climate commitments. There is an intensity reduction target for Scope 1 emissions, aiming for a 10% reduction in global warming emissions per unit of energy from transportation fuels by 2020, relative to 2010 levels. This target is linked to the California Low Carbon Fuel Standard. Additionally, UCS has long-term net-zero targets for both Scope 1 and Scope 2 emissions, striving for very deep cuts to emissions from the power sector by 2050 in the United States, to mitigate the worst consequences of climate change.