Dust, famine, sickness, unfirtile land, native Americans
The United States experienced major waves of immigration during the colonial era, the first part of the 19th century and from the 1880s to 1920. Many immigrants came to America seeking greater economic opportunity, while some, such as the Pilgrims in the early 1600s, arrived in search of religious freedom.
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An ecosystem can recover from even the most devastating events such as volcano eruptions. For instance, it has been observed that after the eruption of Mount Saint Helens, all of the plant life lay waste. However, and contrary to scientists' forecasts, majority of thee plant life began to grow anew in the wastelands after the eruption. Furthermore, animals from outside the region began to transfer to the area starting with airborne insects, herbivores and the rest respectively.
This was not an isolated case, and has been found in places like Mt. Rainier & Mt. Fuji. These recoveries give us a glimpse of the ecosystem's even to the most harsh conditions.
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The invention of the steamboat
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Their speed and ability to travel against the current reduced the time and expense of shipping..Hope this helps!
Answer: well, The small states wanted each state to have the same number of representatives in Congress. The big states wanted representation based on population. That’s was the disagreement.
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