The UN has announced record average levels of CO2. So states the annual flagship report released October 30 by its World Meteorological Organization. The average levels measured using ships, aircraft and land stations have reached over 400 parts per million (ppm), prompting the authors and other scientists to urge strong action.
That climate change will affect food production is intuitive. Rising global temperatures and the consequent extreme weather events and changes in climate patterns impact production, distribution and potential for spoilage. Some of the worst hurt will be people in a broad tropical belt of countries in Africa, Asia and the Americas. And ever more severe hurricanes and typhoons will do their damage to coastal areas.
The levels of CO2 have been rising steadily since the industrial revolution. In the nearly 60 years since 1958, they have increased from 316 ppm to the latest figure of 406.58 ppm measured on January 22, 2017. It is the highest figure in human history. A Harvard study predicts CO2 to increase in the range 500-700 ppm for 2050-2100. Meanwhile, the US Global Change Research Program projects CO2 levels to reach anywhere from 540-958 ppm by 2100 — the latter figure a truly disconcerting scenario.