Ireland relied on imports of food and fuel, which became a problem when German submarines stopped all British ships leaving Britain.
Sean Lemass started the Irish Shipping Company, to transport goods to Ireland with 15 ships. Fuel and food remained in short supply.
Lemass also introduced the Compulsory Tillage Scheme, where farmers were required to till a certain acreage of land.
Rationing of food, clothing, and fuel was introduced to combat the shortages. This limited the amount of goods a person could use.
Fuel Shortages and Glimmer men:
As electricity and petrol were in short supply, the government introduced glimmer men, who were government inspectors coming house to house to ensure resources weren't overused.
If resources were overused, you could be cut off of the resource or be prosecuted in court.