I especially agree with the last part:

This does not mean employing a tree-hugger; it does mean, however, building sustainability into your strategy and process and that may require employing a properly integrated sustainability/environmental specialist. But there is a business case for that, as any company that has reduced its carbon footprint and discovered that this also reduces your operating costs has discovered.

I also believe that we need to move beyond the “Treehugger” image of the environmental/sustainability movement. The new generation of sustainability professionals now mostly know a lot about business and how business works. These people need to drive Sustainability in the future in my opinion.