Let's be completely ignorant and compare toxic substances to naturally occurring gases (CO2) that are required for life.
Man-made processes are require to turn castor beans into ricin. You just don't simply wander around running into ricin naturally occuring in the wild. Similar to most of the poison gases used in WWI, a man-made process is required to turn natural items into deadly gases. The deadly gases don't simply naturally occur.
You don't turn castor beans into ricin, you obtain ricin from castor beans. At any rate, who cares? "Too much of a good thing" applies here, i.e. elementary folk wisdom.
Do you even try to think before you post? CO2 is required for plant life, not animal life. Are you a plant? CO2 is a waste product to animals, making it little different scientifically speaking than urine and feces. If somebody started increasing the urine and feces content of your food, would you consider that grounds for concern? Well, fossil fuels are doing that to your air, numbnuts. Grow a brain and learn how to use it.
You and Rectum should refrain from commenting in any climate science discussions. The two of you are too stupid to offer any information of value.
And yet it is responsible for around 20% of the earth's greenhouse effect. Funny how that works huh? Are you also trying to be as stupid as jerm and pisspoor?
Exactly the type of response I'd expect from an Obamatron. If someone disagrees...or does not conform..... advocate their elimination. Your replay makes obvious your severe thinking disorder. I have no uncertainty that you would have made a good Nazi.
And the other stupid idiot shows up who knows nothing about the current science of natural climate change. Go put your head back up your ass, futurecunt. This discussion is over your head.