“Our study reveals how responsive the surface transportation sector’s emissions can be to policy changes and economic shifts,” the study’s authors wrote.
“Surface transport accounts for nearly half the decrease in emissions during confinement, and active travel (walking and cycling, including e-bikes) has attributes of social distancing that are likely to be desirable for some time and could help to cut back CO2 emissions and air pollution as confinement is eased.”
Carbon Dioxide Emissions Decreased 17%
The study found that daily worldwide carbon dioxide emissions decreased by 17%—by 17 million metric tons (19 million US tons)—during the peak of international pandemic-related confinement measures in early April. Emissions from surface transportation alone dropped by 43%.
“The extent to which world leaders consider climate change when planning for their economic responses post COVID-19 will influence the global CO2 emissions paths for decades to come,” said Corinne Le Quéré, lead author of the study.
“For example, in cities and suburbs, supporting walking and cycling and the uptake of electric bikes is far cheaper and better for well-being and air quality than building roads, and it preserves social distancing.”
Le Quéréc is a Royal Society research professor of climate change science at the University of East Anglia in Norwich, England. She was quoted in a university news release.
Biggest Emissions Drop since WWII
The study predicted that emissions for the year would decrease by 4% to 7%. That may seem like a small change, said Rob Jackson, another study author, “but it will still be the biggest emissions drop since World War II.”
Jackson, a professor of Earth system science at Stanford University’s School of Earth, Energy & Environmental Sciences, was quoted in a Stanford news release.
He pointed out that the 2008 financial crisis caused emissions to fall only 1.5%. They then leaped up by 5% the following year because the crisis didn’t change fossil-fuel infrastructure.
Telecommuting: the New Normal?
This time might be different. “COVID-19 may change commuting and transportation permanently,” Jackson said. “Cities from Milan to Seattle are closing miles of streets to traffic permanently and opening them to pedestrians and bicyclists. Telecommuting, even part-time, might be the new normal.”
In that way, he said, the pandemic might resemble the oil supply shocks of the 1970s, which did trigger some fundamental changes. “They led to everything from smaller cars to the birth of the solar and Alaskan oil industries.”
This time, the pandemic might accelerate another shift that’s already in progress. “Electric cars are fast and can be fossil-free,” Jackson said, “changing a sector of the economy that’s been hard to decarbonize.”
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