18 Jul 2021 – Measurements of the carbon dioxide content of the earth’s atmosphere as a function of time have been made ever since 1958 at the Mauna Loa Observatory in Hawaii, the “Keeling Curve”. Despite promises made at the 2015 Paris Conference, despite global concern about the threat of catastrophic climate change, despite massive worldwide protests organized by Greta Thunberg, despite the reduced emissions resulting from the COVID-19 lockdown, the Keeling Curve continues to rise steadily, and the carbon dioxide content of the earth’s atmosphere continues to rise steadily.