Weekly average #CO2 concentration for week commencing January 31 2021 was 417.12 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.62 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Monthly average #CO2 concentration for January 2021 was 415.28 ppm recorded at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 1.89 ppm from January 2020. Data: esrl.noaa.gov/gmd/ccgg/trends. Daily updates at co2.earth/daily-co2

October 2020 global average Methane abundance calculated by NOAA ESRL was the highest monthly level ever recorded at 1890.9 ppb. An increase of 15.5 ppb from October 2019. Data: esrl.noaa.gov/gmd/ccgg/trend…

Weekly average #CO2 concentration for week commencing February 7 2021 was 416.91 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing February 14 2021 was 416.51 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.39 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing February 21 2021 was 416.31 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.35 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing February 28 2021 was 417.97 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 3.9 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Monthly average #CO2 concentration for February 2021 was 416.75 ppm recorded at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.41 ppm from February 2020. Data: esrl.noaa.gov/gmd/ccgg/trends. Daily updates at co2.earth/daily-co2

November 2020 global average Methane abundance calculated by NOAA ESRL was the highest monthly level ever recorded at 1891.9 ppb. An increase of 16.3 ppb from November 2019. Data: esrl.noaa.gov/gmd/ccgg/trend…

Weekly average #CO2 concentration for week commencing March 7 2021 was 416.94 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.6 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing March 14 2021 was 417.73 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 3.21 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing March 21 2021 was 417.67 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Monthly average #CO2 concentration for March 2021 was 417.64 ppm recorded at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.9 ppm from March 2020. Data: esrl.noaa.gov/gmd/ccgg/trends. Daily updates at co2.earth/daily-co2

December 2020 global average Methane abundance calculated by NOAA ESRL was the highest monthly level ever recorded at 1892.3 ppb. An increase of 17.7 ppb from December 2019. Data: esrl.noaa.gov/gmd/ccgg/trend…

Weekly average #CO2 concentration for week commencing April 4 2021 was 419.28 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.64 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing April 11 2021 was 418.96 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 2.52 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

Weekly average #CO2 concentration for week commencing April 18 2021 was 418.2 ppm at Mauna Loa Observatory, Hawaii, #NOAA. An increase of 1.96 ppm from the same week last year. Data: esrl.noaa.gov/gmd/ccgg/trends. Updates at co2.earth/daily-co2

The combined effect of all greenhouse gases in our atmosphere (CO2, Methane, Nitrous Oxide and halogenated compounds such as CFCs) reached the equivalent of 504 ppm of CO2 in 2020. Data and additional information: esrl.noaa.gov/gmd/aggi/

Monthly average #CO2 concentration for May 2021 was 419.13 ppm recorded at Mauna Loa Observatory, Hawaii, #NOAA. This is the highest monthly average in the record and an increase of 1.82 ppm from May 2020. Data: esrl.noaa.gov/gmd/ccgg/trends. Daily updates at co2.earth/daily-co2

February 2021 global average Methane abundance calculated by NOAA ESRL was 1888.9 ppb. An increase of 15.8 ppb from February 2020. Data: esrl.noaa.gov/gmd/ccgg/trend…