Even if humans are increasing CO2 in the atmosphere... how is that bad when plants, phytoplankton, algae, etc use CO2 for photosynthesis...they crave it... the more they get, the more they flourish, the greener the world gets, the more oxygen the produce for us. So you see, it's not CO2 that's the problem... it's the unproven underlying assumption that CO2 is directly linked to global temperature... that is the problem.