As much a reasonably feasible, ensure that goods and services procured are sourced from companies who follow sustainable practices (social and environmental norms) using life-cycle costing in procurement decisions.
Why does Mcgill libraries not have a adequate supply of headphones for rent? They could be 3-6 hrs rentals, that way we would not over consume the cheap headphones the library supplies students with right now. The rent-able headphones could be bought from a north american company.
Adapted from LSE Environmental Policy 2011:
Require contractors, sub-contractors and suppliers to meet or exceed all relevant environmental legislation and regulations and work to improve the environmental performance
Support the communication and delivery of a Fair Trade Policy