"No form of transport requires less energy than telecommuting" is quite the statement. If your work force bikes or walks to work, pretty sure that has far lower energy requirements than having all of them telecommute.
Telecommuting: Turn on your PC in a room of your house and start work Biking/Walking to Work: Bike/walk to work and turn on a PC in an office.
What's the extra telecommuting energy expenditure? Servers for a VPN?