Carbon dioxide is the most starved for plant nutrient and would help mediate the due cyclical ice age, a 10 fold increase to .5% although causing mild symptoms in humans would be extremely beneficial to the plant biosphere and could save most life on Earth from the due 90,000 ice age.
--LorisHemlof (talk), Adelaide, Australia, 05:53, 30 September 2013 (BST)
Carbon dioxide is the most starved for plant nutrient and would help mediate the due cyclical ice age, a 10 fold increase to .5% although causing mild symptoms in humans would be extremely beneficial to the plant biosphere and could save most life on Earth from the due 90,000 ice age.
--LorisHemlof (talk), Adelaide, Australia, 05:53, 30 September 2013 (BST)