secondary products, possibly of commercial value, which are obtained from the chemical or physical processing of material. "By-product" was a term used for a residual from processing, which [..]

 | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

 the solution of one component of a gaseous mixture into a liquid, or the penetration of a gas or liquid into a porous solid. acid gas:

 precipitation, whether rain or snow, where the water has an acidity greater than normal (effectively a pH of less than 5.7). It derives from interaction of water vapour in air with sulfur and nitroge [..]

adsorption:

 a biological conversion process in which micro-organisms respire oxygen to digest/decompose biodegradable organic compounds. aerosol:

 estimates of the amount of a substance emitted to the environment annually from: (a) facilities which are not reporting facilities; and (b) anthropogenic sources other than facilities, which emit a s [..]

 the integrated operation of agricultural and industrial activities. air quality:

 primitive, non-vascular water plants consisting of a single cell or aggregation of cells. All are relatively simple photosynthetic organisms with unicellular reproductive structures. Algae occur in b [..]