For the most part, schools are located in close proximity to the students. Students are driven to schools either on a bus or by a parent in a vehicle. Therefore, in the morning and after school there are high air pollution levels. If the school is near a manufacturing plant, a highway, a wastewater treatment plant, an airport, or other source of air pollution, the kids breath it in. Schools are chronically stretched for money and air quality is assumed to be good enough when ventilation guidelines are met.
By ProMark Associates, Inc. based in Skokie, ILLINOIS (USA).
The needs to purify the water coming from human consumption are becoming more numerous, before being discharged to natural ecosystems, in wastewater treatment plants. It also increases the need for solid waste treatment in landfills to minimize environmental impact.
By Bioconservacion SA based in Barcelona, SPAIN.
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