The Dust Bowl, also known as the Dirty Thirties, was a period of severe dust storms that greatly damaged the ecology and agriculture of the US and Canadian prairies during the 1930s; severe drought and a failure to apply dryland farming methods to prevent wind erosion (the Aeolian processes) caused the phenomenon.
Because you could just sit in your trench and wait for the opponent to attack, at which point you could shoot him, throw explosive devices, or even use chemical weapons that weren't banned then.
Explanation:
Searching for and Cutting Regulations that are Unnecessarily Burdensome Act of 2016.would establish a commission to review existing federal regulations and identify those that should be repealed, with the goal of reducing the cost of regulations on the economy.
Answer:
steel mines because the others are wrong I think