Increase the flow rate of rinse water so the resulting concentration of chemicals in industrial wastewater meets the municipal sewer use requirements. Replace incandescent lamps in the employee parking garage with energy efficient lamps. Use water-based cleaners in place of solvent-based ones. Send paper waste from the printers and copiers off-site for recycling. How much does the technique/solution contribute to the protection of the environment, on a scale of 1 (little protection) to 5 (lots of protection)?