Climate changes and Energy

There's a great deal of controversy around the actual vs. the theoretical climate changes and who are the biggest offenders of measurable greenhouse effects. Animals? Humans? Industry? Corporate interests? This is actually part 1 of a series of progressive discussions from a 'hands on' environmental scientist and engineer who started with the dream of bridge building and now contributes to our livelihood by easing traffic flow and ultimately saving us time and wasted fuel emissions.