which ethnicity contribute to the country's population?
White Americans of European ancestry, mostly German, Irish, English, Italian, Polish and French, including white Hispanics and Latinos from Latin America
United States
The United States has a very diverse population; 37 ancestry groups have more than one million members. White Americans of European ancestry, mostly German, Irish, English, Italian, Polish and French, including white Hispanics and Latinos from Latin America, form the largest racial group, at 73.1% of the population. 
when did the colorado river stop reaching the ocean since the 1960s. where is it located? In the Southwestern United States and northern Mexico. does the above mentioned water body have any impact on environment? Yes, reduced flows have led to increases in the concentration of certain substances in the lower river that have impacted water quality. is there any controversies related to it? Taylor saw the fact that the Colorado River started outside the border of his state as an "abomination". who was the person mentioned above? Edward Thomas Taylor was a lawyer and educator who served as a U.S. Representative from Colorado. A member of the Democratic Party, he served 17 terms in the U.S. House, from 1909 to 1941. where was he born? Metamora, Illinois. it falls under which country? United States. how many states the country consists of? It consists of 50 states.
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United States [SEP] Population
White Americans of European ancestry, mostly German, Irish, English, Italian, Polish and French, including white Hispanics and Latinos from Latin America, form the largest racial group, at 73.1% of the population. African Americans constitute the nation's largest racial minority and third-largest ancestry group, and are around 13% of the total U.S. population. Asian Americans are the country's second-largest racial minority (the three largest Asian ethnic groups are Chinese, Filipino, and Indian). In 2017, out of the U.S. foreign-born population, some were naturalized citizens, were lawful permanent residents, were temporary lawful residents, and were unauthorized immigrants. Among current living immigrants to the U.S., the top five countries of birth are Mexico, China, India, the Philippines and El Salvador.