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.
Burning carbon requires oxygen (O2), and when we burn an atom of carbon, the required oxygen becomes part of the CO2 molecule. So if the CO2 increase is caused by burning carbon (fossil fuels), we would expect atmospheric O2 levels to decrease at the same rate. And that's indeed what we observe (Figure 1).
For many years I have been a skeptic of global warming because the climate record available to assess the effects of increased carbon dioxide emission has been too short to say with confidence that the effect is real.t is unclear whether global warming is due to increased carbon dioxide concentration or if carbon dioxide concentration is the result of global warming.