What+is+being+done+to+solve+the+problem

===﻿In our last slide we discussed what waste water treatment was, but how is this process becoming a solution to the world's energy and pollution crisis. What many people fail to see aside from the fact waste water treatment recycles our worlds water resources is that Wastewater may contain high levels of the nutrients nitrogen and phosphorus. Excessive release to the environment can lead to a build up of nutrients, which can in turn encourage the overgrowth of weeds, algae and cyanobacteria (blue-green algae). This may cause a rapid growth in the population of algae. The algae numbers are unsustainable and eventually most of them die. The decomposition of the algae by bacteria uses up so much of oxygen in the water that most or all of the animals die, which creates more organic matter for the bacteria to decompose. In addition algal species produce toxins that contaminate drinking water supplies. High levels of phosporus are found in wastewater and these nutrients help algae to grow so without the treatment algae would become overwhelmed in the oceans and rivers the water is put back into and cause much of the sea life to die. Waste water treatment is a process that not only allows us to save our usable water sources but helps treat it so when it is put back into the rivers and oceans of our world its safer than it was before it came into the facilities. ===

__The Benefits __
===Water pollution prevention and control measures are critical to improving water quality and reducing the need for costly wastewater and drinking water treatment. Because water pollution can come from many different sources, a variety of pollution prevention and control measures are needed. === ===Waste water treatment worldwide send more than 69 percent of the civilized world's water sources back as reusable water. This helps save the world's fresh water supplies, as well as, keeps it clean for all living things to benefit. ===

Waste water treatment are a source of emission of the greenhouse gases CO2, CH4 and N2O into the atmosphere.
===CO2-880 million kg/yr (0.5% of the total CO2-emission in an average country), CH4-12.5 million kg/yr (1% of the total CH4-emission) and N2O-829,000 kg N per year (0.9% of the total N2O-emission). ===