Water covers over 70% of the Earth’s surface! So what is the problem? Well, only 2.5% is fresh water; and most of this fresh water goes to agriculture, where much of it is lost through poor irrigation techniques. Waste can be reduced by using drip systems—watering systems that use a main hose with small holes that emit water directly to plants—that operate at close to 95% efficiency; developing plants that require less water, such as drought-resistant rice; and requiring industries to reclaim and recycle their water. Although future water supplies may be increased by desalinization, current processes are generally not economically feasible. Conservation of water is critical! The U.N. reports that 783 million people worldwide lack clean water. A supply of clean, potable water (safe for human consumption) is essential for life.