"Trains vs. Planes vs. Automobiles"
The last part really caught my eye:
"...in some cases, construction is the biggest polluter. Roads were responsible for more particulate matter than tailpipes, for example. For rail travel, operating the trains actually accounts for less than half of a system's greenhouse-gas emissions. The implication: Making concrete and asphalt in a more environmentally friendly way can be just as important as getting vehicles to run more efficiently. In other words, it's not just the road you take, but what it's made out of, too."
Again, sustainable construction is a big deal, an important piece of the green movement. Running a cutting-edge green concrete company isn't glamorous, but I'd bet that it could be profitable in the near future. A smart green person could have an advantage on the usually slow-to-adapt traditional construction industry. I'm just sayin'...
