. . . "K.????????????????????? The manufacture of acid, cement, electric power, explosives, nuclear components, fireworks, pesticides, fertilizer, gas, glue, gypsum, inflammable fluids or gases; incineration of garbage; refining of petroleum and its products; tank farms; smelting of copper, iron, tin, zinc, and other ores and other uses which might be objectionable by reason of the production or emission" .