s is 
the fastest rate of CO<INF>2</INF> acquisition or increase in global 
history. And what we see now is we are now up to about 370, I believe 
it is about 378 parts per million. So we have gone from about 275 a 
thousand years ago and just in the last hundred years we have gone up 
about half of that again up to about 373, 378 parts per million. So we 
were a third or half, depending on how you categorize that number, 
higher than we were and what are called pre-industrial times.
  Now, why is that impo