What happens to the solids in wastewater at a wastewater treatment plant?

a. they are used as fertilizer on hay fields.
b. they are chemically aerated and released into the air.
c. they are released into a river, lake, or ocean.
d. they are treated and returned to people's homes.

The answer is A. They are used as fertilizer on hay fields

A. They are used as fertilizer on hay fields.

Explanation:

Solid wastes are the unwanted wastes that are generated by different sources such as domestic wastes, agricultural, and industrial wastes. These wastes are treated with several waste management processes such as use of landfill, incineration, dumping and humification. The biodegradable wastes can be transformed into slury which can be used as a natural fertilizers in the hay fields.  

beta decay is the answer

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).