News Headline
'Why have carbon dioxide levels risen and fallen in the past?'
Source
Yale Climate Connections
Publication Date
2020-03-30
This is not the column I planned to publish this month. I wrote another one several weeks ago in answer to a reader’s question about tourism in Europe. As you might imagine, that column was swiftly rendered out of date, becoming nothing more than a time capsule of life before COVID-19 became a global pandemic.