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.
1 Second, CO2 is a greenhouse gas. 2  Third, during the last 30 years, global temperatures have been rising. 3  Fourth, the things that ordinary cause temperatures to rise -- such as increased solar activity -- are not causing the current rise in temperature. 4  Therefore, increased C02 is causing global warming.