Note - the causes of the currency crises are very complex. Note that oil prices are quoted in dollars in international markets, thus when the value of the won decreases, the price of oil increases. Gas prices rose again in February in South Korea, but have declined somewhat since. One side effect of this was a decrease in the amount of trash deposited by Koreans. In periods of economic crises customs often change.
Economists debate the actual number of unemployed, but the effect has been significant.
With the price of gasoline increasing, the number of cars on the road decrease. Tire sales drop, toll collection fall, and even more people are unemployed as a result.