At its peak, emissions fell by as much as 26 per cent.
Camera IconProtesters with placards participate in The Global Strike 4 Climate rally in Sydney a year ago. As a result, the coronavirus crisis could trigger the largest ever annual fall in Carbon dioxide emissions in 2020, more than during any previous economic crisis or period of war.⠀ ⠀ Follow the link in our bio to read the full analysis.
The peak 17% daily decline occurred on April 7, when China, the U.S., India and most other major carbon-emitting countries were all under a high-level of lockdown simultaneously, Canadell added.
The largest drop in carbon emissions came from the reduced traffic from cars, trucks and buses, accounting for roughly 43% of the total estimated emission reduction, the researchers found. Reductions in the power and industrial sectors accounted for another combined 43% of the total.
Camera IconThe greatest decreases in emissions were seen in surface transport.
Transport, industry and power stations are the main sources of Carbon dioxide and air pollution, and emissions have been growing rapidly in recent decades.
Its authors are predicting that 2020 will bring the largest year-over-year emissions drop since World War II, or potentially ever depending on how long stay-at-home orders remain in place.
"The real lesson of this pandemic is that we must globally shift our energy production away from fossil fuels as quickly as possible if we are to ensure sustained year-on-year cuts to our global emissions", Richard Betts, the head of climate impacts research at the Met Office Hadley Centre said, per The Guardian.
They studied energy data and weather data sourced from different sources in more than 400 cities and 130 countries to produce daily estimates of carbon emissions for 2019 and 2020.
Before the coronavirus, the scientists said global emissions were rising by about 1 per cent per year over the past decade, with the exception of 2019, which saw no growth.
The reduction in emissions this year is similar to reductions required to meet in the 2015 Paris Climate Agreement, which aims to limit global warming to 1.5 to 2 degrees Celsius above preindustrial levels.
"The emanations decrease happening on account of Covid-19 will be exceptional".
Emissions from the power generation sector dropped 7.4 per cent, while household emissions rose 2.8 per cent, reflecting the millions of people staying at home around the globe.
"Unless anything structurally changes, we can expect emissions to go back to where they were before this whole thing happened", he was quoted as saying.
However, air pollution has come roaring back since April as governments in China have started allowing sections of the economy to reopen.
The changes in activity were also outlined in a report published by the International Energy Agency on Wednesday, which found road transport activity and aviation transport halved throughout most international markets in April.