Answer:
A: by inventing the printing press
Explanation:
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Answer:
from roughly 2550 to 2490 B.C
Answer:
It includes different sciences, such as biology, chemistry, and earth sciences. With the help of toxicology, environmental scientists can study the toxic effects of chemicals on humans.
Explanation:
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Child labor was big back in the 1890s. Children were deprived of their childhood. Instead of playing and having fun they were put to work. Instead of school they had to provide for their family. Ages 10 and up started to work. Most work places like coal mines were very harmful to the kids. Just from breathing the pollution in to cutting them self on work equipment it was a very dangerous place. In 1938 child labor was officially discontinued.
