barrels

age asphalt barrel black carbondioxide cask chemical chemistry climate consumption container crisis crude damage danger demand dioxide disaster drum dump ecology effect energy engine environment environmental exchange factory fossile fuel gallon garbage gas gasoline gold greenhouse grey hazard hazardous heating industry inflammable investment leak lubricant machine material metal need object oil opec petroleum pollution processing profit propellant raw recycling refinery reseve resource rusty safety scarcity shock short speculation stock supply synthetics toxic waste