underBlockade, countries around the world restricted travel and closed businesses. The flight was grounded and the highway was unmanned. Significant deceleration of movement — The daily level is 17% lower than last year’s average.
Daily emissions in early April, when most of the world was subject to strict blockades, fell to the levels last seen in 2006, according to a study published in Nature Climate Change on Tuesday.Up to 7% decline, according to researchers — the largest decline since World War II.
Scientists have looked at data from major economic sectors to study blockade measures in 69 countries, which account for 97% of global carbon dioxide emissions. They point out that a significant decline in transportation use and industrial activity during the pandemic is the main cause of the decline.
According to the survey, the biggest factor is the shortage of vehicles on the road, which accounts for 43% of the decrease.on the other handCarbon dioxide emissions have been reduced by a staggering 60%. This industry generally accounts for only about 3% of the world’s annual carbon emissions, and its overall impact is much smaller than in other industries.
These numbers are important, but carbon dioxide remains in the atmosphere for thousands of years.Scientists warn that otherwise this rapid but relatively short decline is unlikely to make a meaningful difference in the long run.Priority.
“Population confinement has brought about dramatic changes in energy use and CO2 emissions, but these extreme declines do not reflect structural changes in the economy, transportation, or energy systems, so they are temporary. “It could be something like that,” said the University of East Anglia, one of the lead authors of the university’s Corinne Le Quéré professor’s research, in a press release. “How much climate change is considered by world leaders when planning their economic responseIt will affect global CO2 emission pathways in the coming decades. “
Researchers say the biggest change in emissions is, Followed by the United States, Europe and India. They expect a 4% to 7% decrease each year, depending on how long the various countries are blocked.
Such a significant reduction in annual emissions is the kind of reduction that the planet must continue to maintain in order to meet the goals set by the Paris Agreement to prevent global warming from exceeding 2 ° C. Is equivalent to. CBS News meteorologist and climate expert Jeff Berardelli.. But closing the economy is clearly not a sustainable way to get there.
“Although the reduction in emissions is considerable, it presents the challenge of achieving Paris’ climate change efforts,” said Rob Jackson, a professor at Stanford University who co-authored the study. “We need systematic changes with green energy and electric vehicles, not temporary reductions due to forced action.”
Concerns are not groundless — China’s air pollution is already happeningThe blockade has been lifted. The rebound appears to be caused by industrial emissions, as China has allowed most economic activity to resume.
In addition, the current crisis could push environmental initiatives further down the list of people’s priorities. Following the Great Depression of 2008, climate change researchers have noticed that public interest in the environment has diminished, probably due to economic instability. When faced with imminent threats such as viruses and widespread unemployment, people tend to pay less attention to what they consider to be more distant risks, such as:, Berardelli explained.
However, there are some hopes that a pandemic may permanently change people’s behavior. Cities around the world are closing streets for pedestrian traffic,It may be new and ordinary, and electric cars are more popular than ever.
The pandemic is alsofor .. “Air pollution weakens the heart and lungs and makes the virus stronger,” Jackson said. “Clean electricity combined with electric vehicles can provide clean air for everyone without having to evacuate to their homes.”
Studies show that the blockade of coronavirus reduces carbon emissions by 17% worldwide.
Source link Studies show that the blockade of coronavirus reduces carbon emissions by 17% worldwide.