Actual fossil fuel emissions checked with new technique

Researchers have measured CO2 emissions from fossil fuel use in California and compared them to reported emissions. This is the first time fossil fuel emissions have been independently checked for such a large area. Carbon dioxide (CO₂) from fossil fuel combustion is the primary driver of climate change, and many governments, companies and citizens are making efforts to curb their emissions. A key part of this effort is measuring the change in emissions. Our study is the first example of how atmospheric measurements can help to check on fossil fuel CO2 emissions over an area large enough to encompass nations, provinces or states. Dr Heather Graven Countries and regions report their CO₂ emissions from fossil fuels by counting what they have used, such as the amount of oil, coal or gas they have burned. However, there may be uncertainty in these estimates, for example depending on the composition of the fuel.