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.
Causes for rising emissions. 1  Burning coal, oil and gas produces carbon dioxide and nitrous oxide. 2  Cutting down forests (deforestation). Trees help to regulate the climate by absorbing CO2 from the atmosphere. 3  Increasing livestock farming. Cows and sheep produce large amounts of methane when they digest their food.