On a conceptual level it is not difficult to get agreement on the positive potential for changes implied in this topic.  You can see how business is now using "green marketing" to take advantage of the concept. But on a day to day basis changing the habits of organizations is a challange.

For example, how many vehicles are on the road morning and night commuting people to and from a computer that is connected to the internet? The majority of many worker days are spent using email, messaging, VoIP,  telephones, web conferencing, etc.  to interact with fellow workers via technology. Yet it seems the physical meeting is still the expected requirement for value of corporate participation.  

The lack of trust by management of many, many organizations in all sectors of government, education and business has hampered significant adoption of telecommuting, flex time and virtual working, when in fact reduction of commuting by 1/2 would have a huge impact on energy consumption, carbon emissions  and quality of life. More than all the windmills combined, I would expect.

The technology is already in place - but the organizational changes will require a tranformation of attitude among speadsheet modelers, real change in thinking at the top (including rethinking compensation models)  and embracing levels of transparency  at all levels of the organization that some will find threatening.

I have some case study examples if this is of interest or is approporiate to this topic.