Answer:
chlorination
Explanation:
The use of chlorination to treat drinking water, which began in 1913, reduces the incidence of waterborne diseases.
Answer:
It is important because with these laws in place it helps people be able to follow the same guidelines and helps people not to be doing so many things at once like for example one person is doing something for a sition and another is doing something different for the exact same situation. It would otherwise be chaos without it.
