Smog , illegal dumping , excessive lights , and loud , sustained noise are examples of

Modern smog, as found for example in Los Angeles, is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes that react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog.

Ithink the dna sequences may vary but the amino acid sequences are identical.