Health claims describe a relationship between a food substance (a food, food component, or dietary supplement ingredient), and reduced risk of a disease or health-related condition.ealth claims describe a relationship between a food substance (a food, food component, or dietary supplement ingredient), and reduced risk of a disease or health-related condition.
However, human activities are now increasing the concentration of carbon dioxide in our atmosphere, amplifying the natural warming caused by the greenhouse effect. During the Industrial Revolution, humans began burning coal, natural gas, and oil to power machines for manufacturing and transportation.
U.S. government scientists working at an observatory on the big island of Hawaii reported today that the concentration of carbon dioxide in the atmosphere is higher than at any time over the last several million years.ost scientists believe the burning of coal, oil, and natural gas is helping cause the rapid rise in carbon dioxide levels.