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Write a paragraph explaining the causes, events, people, and effects of World War II.
(please answer in your own words, thank you)

World War 2 began because of Germany's invasion of Poland. After Poland was invaded, Britain and France declared war on Germany.

The main countries involved were the U.S., Great Britain, France, the Soviet Union, Germany, and Japan. Some of the main people in the war were Adolf Hitler (Germany), Benito Mussolini (Italy) , Winston Churchill (Britain), and Joseph Stalin (soviet union). One main event in the war was the bombing of pearl harbor, which was why the U.S. entered the war.

Explanation:

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.