The low price of oil will affect other industries because no one will buy their oil unless they have a lower price.
Example: You own a gas station and you need to buy oil from an industry to refill your station. Industry A sells oil at $10 per gallon (example). Industry B sells the exact same oil at the price of $20 per gallon (example). As any sane person would, you would buy oil from Industry A. This shows how the low price of oil can affect other industries.
