The concentration of suspended particulates in the atmosphere can be measured by forcing air through a semi-porous paper that filters the particulates from the air. Determine the suspended particulate concentration (in milligrams, mg) from the measurements presented as following: airflow rate = 0.71 cubic meters per minute air sample time = 24 hours weight of filter paper before sampling = 4.5722grams weight of filter paper after sampling = 4.7424 grams.

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Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.