Читать книгу How Can I Stop Climate Change: What is it and how to help - Литагент HarperCollins USD, F. M. L. Thompson - Страница 61

In 1958 US scientist Dr Charles D Keeling at the Mauna Loa Observatory in Hawaii began measuring the concentration of carbon dioxide in the atmosphere. Plotted on a graph, his results form a rising curve now known as the Keeling Curve. This shows that carbon dioxide levels vary with the seasons – by as much as 3 per cent over 12 months – because many trees in the Northern Hemisphere do not take up carbon dioxide during winter. Over and above this variation, however, we can detect a steady increase in the past 50 years.

Dr Keeling was the first scientist to report that carbon dioxide in the atmosphere was increasing, alerting the world to the threat of climate change.