"On April 7, global carbon dioxide emissions plummeted to levels not seen since 2006, according to a study released yesterday that suggests the coronavirus pandemic might have led to the largest reduction in CO2 ever recorded.
But few scientists are cheering the sudden change.
But a deeper look shows that individual changes in behavior produce limited emission reductions. Much of the world stopped traveling, eating in restaurants and buying merchandise. It was an unmatched experiment and yet 80% of emissions were untouched.
“It shocked me at how much emissions have dropped temporarily and showed me how hard it is to reduce emissions annually for years,” said Rob Jackson, an earth scientist at Stanford University and a co-author of the study.
“I think what this really shows is that in order to meet the sort of ambitious decarbonization targets, we need really large structural shifts in our energy system,” she said."https://www.scientificamerican.com/article/global-co2-emissions-saw-record-drop-during-pandemic-lockdown/