Air pollution in some cities is half what it was a year ago, according to new data from the satellite that has been documenting the impact of the coronavirus lockdown on air pollution across the world
NO2 comes from the combustion of fossil fuels in vehicles, power plants and factories. The European scientists monitor it as a bellwether for other pollutants that derive from the same sources, including greenhouse gases that contribute to climate change.drop in emissions over China
. Scientists have also been combining its data with data from Chinese and American satellites to detect methane leaks. On Tuesday the ESA released this image of methane leaking in 2018 from oil and gas operations in California’s Central Valley:... [+]“For the first time, we can now get detailed information on localised methane emission sources such as oil and gas fields,”
Michael Buchwitz, senior scientist at the University of Bremen in Germany and science leader of the European Space Agency’s Greenhouse Gas Initiative.“TROPOMI is unique because of its high spatial resolution, with which the larger sources and cities can be studied individually.”
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