Conserving resources and saving 'Mother Earth'!

Water is precious. It is our lifeline that bathes us and feeds us. Can we minimize usage of water? Can we avoid using plastic in our practice?  Are there any  alternatives? With the advent of newer tooth bonded restorative materials and various bonding agents and adhesive systems, the use of amalgam as a restorative material has decreased drastically. So chances of mercury contamination have slimmed down. Similarly, can we avoid use of plastics? Are there any means to use water conservatively or any alternatives to water usage in our field?