Rationing of the country, through the 'levelling of consumption of essential foodstuffs'. To assist with rationing, ration books were introduced on 1918 for butter, margarine, lard, meat and sugar. During the war, average calories intake decreased only three percent, but protein intake six percent. Food rationing appeared in Poland after the First World War, and ration stamps were in use until the end of the Polish–Soviet War. Rationing became common during the Second World War. Ration stamps were often used. These were redeemable stamps or coupons, and every family was issued a set number of each kind of stamp based on
Odd–even rationing rationing. However, many people are unaware that zero is even, and this ignorance can cause confusion. The relevant legislation sometimes stipulates that zero is even. In fact, an odd–even restriction on driving in 1977 Paris did lead to confusion when the rules were unclear. On an odd-only day, the police avoided fining drivers whose plates ended in 0, because they did not know whether 0 was even. Odd–even rationing was instituted in the U.S. as part of the response to the second gasoline crisis in 1979, when turbulent conditions in Iraq and Iran led to worldwide oil price increases, even