The Minneapolis Times-Tribune published an Associated Press report this week on a 17-year study undertaken by Stanford University scientists to test the impact of more carbon dioxide, more heat, and more nitrogen on plant growth in test plots outside Los Angeles. Test plots (132 in all) were treated with different amounts of carbon dioxide or nitrogen or heated two degrees Centigrade to simulate the climate that is expected to occur in the second half of the 21st century. The results showed that contrary to expectations, more carbon dioxide did not increase plant growth, and higher temperatures reduced plant health and growth. Only increases in nitrogen increased plant growth. You can read more about their findings at https://www.startribune.com/future-climate-change-field-test-doesn-t-make-earth-greener/392357051/.
