Share Environmental Policies
Alert suppliers/partners to the fact that you are part of the GVI, share your environmental policy with them and ask to see their environmental policy.
Ask For Energy Efficient Equipment
Always ask for the most energy efficient equipment or goods: just by asking you may get the newer stock that has a better efficiency rating.
Carbon Efficiency is a Decider
Inform suppliers that the carbon efficiency of their products and services will be part of the way you decide which to choose.