I saw a similar documentary. As the earth’s temperature increased it decreased the amount of carbon dioxide that the ocean could hold. So carbon dioxide was released therefore causing an increase in atmospheric temperature which in turn released more carbon dioxide etc. As you said before; a feed forward reaction.  
I saw that documentary a while ago. It was well balanced and had representatives from both sides of the argument. It has since been a while since I have heard anything that has been so unbiased.  
That graph about ice-core data has been used for the “global warming” argument without stating that the increase in earths temperature caused the release of carbon dioxide. Face it, both sides only see the evidence that supports their own argument.  
After a while the public (those who can really make a difference) see only the bickering and close their ears to the argument.  
Ok, so global warming is a problem. What are you going to do about it?  
Most likely the things you would do are good for reasons other than global warming. It seems these days everything good people do for the environment is to stop global warming. For example a decade ago we planted trees to prevent soil erosion, salinity and to feed koala bears. Now we plant trees to trap carbon.  
There are reasons other than global warming to do good.  
Perhaps it would be best if you focus a little more on the other reasons for doing good to if you want to gain support from people who don’t believe in global warming and those who sit on the fence.

Guest