1. The capture of Jerusalem
2. Creation of the Kingdom of Jerusalem and other Crusader states
3. Unnessesary loss of life on both sides
Answer:
The loss of farms during the Great Depression.
Explanation:
This phenomenom known as the "Dust Bowl" was one of the worst ecologic disasters of the 20th Century. During 1930's (and up to 1932 and 1939) droughts affected the plains and meadows extending from the Gulf of Mexico to Canada. The Dust Bowl effect was produced by persistent drought conditions, favoured by years of soil manipulation that left it vulnerable to the effects of wind. Since its humidity levels were almost zero, soil was lifted up by the wind in the form of big sand and dust clouds. The Dust Bowl multiplied the effects of the Great Depression in the zone and caused the greatest displacement of population during a short period of time in United States' history. Three million inhabitants left their farms during 1930's, and more than half a million emigrated to other States, especially to the west.
Things such as electricity, petroleum and steel. The revolution was possible due to the availability of natural resources (petroleum), strong government, transportation methods, power supplies, and a high amount of laborers.
Specific people involved are Andrew Carnegie who dominated the steel industry and owned J.P Morgan; Alexander Bell who created the telegraph. There's also John D. Rockefeller who greatly influenced the oil industry and Cornelius Vanderbilt who use railroads to connect major cities.
Hope I helped :)