The EPA absolutely lost it in my (scientific) opinion when it declared carbon dioxide harmful to the environment and started this insane unscientific, but hightly lucrative (for government) policy of carbon taxes. Carbon dioxide is exhaled with every breath from every animal and is a necessary reactant in photosynthesis, which produces atmospheric oxygen. If carbon dioxide is produced, photosynthetic rate increases, thus removing it from the atmosphere. Photosynthesis and aerobic respiration are in oppositional equilibrium. The EPA tends to overlook this relationship, which is necessary to maintain life on this planet. Their science on global warming is not, as the EPA claims, settled science, either.