Hoovervilles and the economy. As the economic crash of the 1930s dragged on, more and more people were ruined. Delinquent taxes, drastically rising unemployment and mortgage foreclosures were heavy burdens to overcome. Those factors forced ordinary people to either move into Hoovervilles or become transients.
Carbon is the sixth most common element in the universe and the fourth most common element in the solar system. It is the second most common element in the human body after oxygen. About 18 percent of a person's body weight is due to carbon. The black color of smoke is caused by unburned specks of carbon.
Carbon is found in combination in hydrocarbons (methane gas, oil, and coal), and carbonates (limestone and dolomite). OCCURRENCE: Carbon ranks nineteenth in the order of abundance of the elements comprising about 0.2% of the earth's outer crust. In the earth's atmosphere, carbon is present as carbon dioxide.Though it is widely distributed in nature mainly in the combined form, only minor amounts are found in the free or elemental state. It is present as main constituent of all animal and vegetable matter.arbon is found in combination in hydrocarbons (methane gas, oil, and coal), and carbonates (limestone and dolomite). OCCURRENCE: Carbon ranks nineteenth in the order of abundance of the elements comprising about 0.2% of the earth's outer crust. In the earth's atmosphere, carbon is present as carbon dioxide.