coking

"Burning wood for heat produces ash as a byproduct. "

"The noisy construction outside the church was a pollution of the peaceful atmosphere, distracting everyone from the service. "

"The alchemists sought to transform lead into gold."

"After the flood, we found strange deposits of dark, shiny rock in our backyard that were not part of the local soil. "

"The scientist carefully examined the substance to determine its chemical composition. "

"The factory's efficient manufacture of toys allowed them to sell many at a low price. "

"deleterious effects"

"The combustion of wood in the fireplace kept the room warm. "

"The farmer's fields produced a bountiful harvest of tomatoes this year. "

"The family-owned factory in China handled the export of toys to many countries. "

"The storm was incredibly destructive, tearing down trees and damaging many homes. "

"The slow distillation of the melting icicle created a small puddle on the windowsill. "