Avoid purchasing hazardous products in the first place. If you cannot, you are responsible for the safe and correct disposal of it so ensure you employ a licensed contractor. Fluorescent lights, for example, can be disposed of in a special crushing machine that recovers the glass for reuse in loft insulation and the mercury for pure mercury production.
Reduce paper use
Replace tissues in bathrooms only when dispensers are almost empty. If the policy is to replace half toilet rolls, save them for use in employee restrooms or donate to shelters. Consider using double rolls, which provide twice as much paper per roll. Install handdryers in place of paper towels in toilets in public areas. In the office, recycle file folders and inter-office envelopes, use both sides of paper when copying, and send emails not letters.