To mark Earth Day, the Israel Defense Force published this list of how it protects not just the people of Israel, but its environment too. This includes wastewater recycling, solar power, re-using water from air-condition units, filtering bacteria from ship water, recycling engine oil and switching to natural gas.
http://www.shalomlife.com/health/19181/earth-day-special-7-idf-green-innovations-youve-never-heard-of/