Carbon dioxide concentration in the atmosphere is measured in parts per million -- ppm
Sept. 8, 2019 -- 409.25 ppm
Sept. 8, 2018 -- 403.97
Go to scripps.ucsd.edu to see the Keeling Curve, a graphic representation of CO2 gain over the years. Daily measurement is made under the supervision of the University of California, San Diego.
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More from Star Tribune
More From Star Tribune
More From Variety
Sports
Linus Ullmark perfect in shootout, Sabres beat Capitals
Linus Ullmark stopped 28 shots in regulation and overtime and three more in the shootout to help the Buffalo Sabres beat the Washington Capitals 4-3 on Sunday for just their second victory in six games this season.
Local
Wisconsin shows lowest daily COVID-19 total since September
Wisconsin health officials on Sunday confirmed 1,119 positive tests for the coronavirus in the last 24 hours, the lowest daily total since September.
Business
Center-right incumbent wins Portugal's presidential election
Portugal's president was returned to office for a second term Sunday, in an election held amid a devastating COVID-19 surge that has made the European country the worst in the world for cases and deaths.
Sports
Suter scores first 3 NHL goals as Blackhawks beat Red Wings
Pius Suter exhaled after he scored his first NHL goal. Once he got his second, he started thinking about another one.
Local
Despite GOP claim, few valid voter fraud claims in Wisconsin
When Donald Trump continued to falsely claim in December that massive fraud and other voting irregularities had cost him a second term, top Republicans in the Wisconsin Legislature said they were reviewing thousands of complaints about the election.