Answer: Most likely the industrial revolution.
Explanation: The use of machines in production became more and more prevalent, eventually many factories were built in cities which caused pollution therefore making the air gross.
Answer:
Antarctica is important
Explanation:
Antarctica is important as it is the largest water reserve in the world it is constantly feeding the seas with water, gives a home to penguins and otters. it also controls the weather f other regions
The iron curtain was the wall that separated communism from the rest of Europe during the cold war
A factor that led to the growth of the factory system in the United States was the development of new power sources, it's true.
Francisco Vazquez de Coronado- spain
Henry Hudson- english
Philip Amadas-english
René-Robert Cavelier, Sieur de La Salle- france
Jean Baptiste Bernard - french
Juan de Onate- spain
