No one should be exposed to secondhand marijuana smoke. Due to the risks it poses to lung health, the American Lung Association strongly cautions the public against smoking marijuana as well as tobacco products. More research is needed into the effects of marijuana on health, especially lung health. Updated March 23, 2015. See our public policy position on marijuana and lung health.
Carbon fixation is a biochemical process by which atmospheric carbon dioxide is incorporated by plants, algae and (cyanobacteria) into energy-rich organic molecules such as glucose, thus creating their own food by photosynthesis.arbon dioxide exists in the Earth's atmosphere as a trace gas at a concentration of about 0.04 percent (400 ppm) by volume.
The chemical compound carbon dioxide, or CO 2, is an atmospheric gas composed of one carbon and two oxygen atoms. Carbon dioxide results from the combustion of organic matter if sufficien amounts of oxygen are present.arbon dioxide in its solid frozen form it is also known as dry ice. It is used. 1  for cooling. 2  to produce 'dry ice fog' for special effects: when dry ice is put into contact with water, the resulting mixture of CO 2 and cold humid air causes condensation and a fog.