Now the really good news: The increase in our atmospheric carbon dioxide during the 20th and early 21st  centuries has produced no deleterious effects upon Earth’s weather and climate. There is absolutely no correlation between the increase in CO2 and average worldwide or US temperatures. And, predictions of harmful climatic effects due to future increases in hydrocarbon use and resulting increases in minor greenhouse gases such as CO2 do not conform to current experimental knowledge or have any scientific basis. On the other hand, increased carbon dioxide has markedly increased plant growth. Forest growth and farm crop output per acre have grown proportionally with increased atmospheric CO2 that is a key to photosynthesis in plants.