Reply #3: Carbon dioxide can be toxic to animals, but not plants. Only proves to me that

[valerief]

Republicans are plant lifeforms.

http://en.wikipedia.org/wiki/Carbon_dioxide#Toxicity
Prolonged exposure to moderate concentrations can cause acidosis and adverse effects on calcium phosphorus metabolism resulting in increased calcium deposits in soft tissue. Carbon dioxide is toxic to the heart and causes diminished contractile force.<31>

Toxicity and its effects increase with the concentration of CO2, here given in volume percent of CO2 in the air:

* 1%, as can occur in a crowded auditorium with poor ventilation, can cause drowsiness with prolonged exposure. <30>
* At 2% it is mildly narcotic and causes increased blood pressure and pulse rate, and causes reduced hearing. <31>
* At about 5% it causes stimulation of the respiratory centre, dizziness, confusion and difficulty in breathing accompanied by headache and shortness of breath. <31>
* At about 8% it causes headache, sweating, dim vision, tremor and loss of consciousness after exposure for between five and ten minutes.<31>

A natural disaster linked to CO2 intoxication occurred during the limnic eruptions in the CO2-rich lakes of Monoun and Nyos in the Okun range of North-West Cameroon: the gas was brutally expelled from the mountain lakes and leaked into the surrounding valleys, killing most animal forms. During the Lake Nyos tragedy of 1988, 1700 villagers and 3500 livestock died.