Claims that increasing
carbon dioxide would benefit the world’s plants is not, in a sense, incorrect.
Plants need CO2 to grow, but complications arise when the
carbon dioxide levels pass acceptable concentrations.
A plant’s productivity, growth and value in terms of a food
crop deteriorate once C02 levels exceed evolutionary limits.
The world presently have CO2 levels at about 400 part per
million (ppm) and by mid-century it will be far higher and so the world’s food
crops, and billions of people, will suffer.
Reporting in a story headed: “Rising CO2 level may cut crop nutrients, study finds”, the Huffington Post explains how tests aimed at
understanding expected mid-century atmospheric concentrations of 550ppm were
carried out by the Harvard School of Medical Health.
