Here are couple more websites for increasing your knowledge!
In the later 1800's France started having some bad harvests. In this time period having good harvest was very important. It meant lots of food and food prices would be low. In France's case, the price of food dramatically rose because of food shortages. This was hard on most people, but it affected the poor peasants most drastically. The poor people already had a hard time getting food so bad harvests meant a many would starve.
Here are some websites giving you a little more info about the bad harvests!