Answer to Question 1
Connecting the global economy is important for both the economic and social development of developing countries. It can, however, be damaging to the environment and culture of a country.
Answer to Question 2
On the basis of the latest scientific knowledge, the EPA has listed 158 chemicals and substances as criteria pollutants. The majority of these are toxic chemicals, but many are also natural chemicals or conditions that describe the state of water. The list identifies the pollutant and then recommends concentrations for freshwater, saltwater, and human consumption.
Drinking water standards are stricter. For these, the EPA has established the Drinking Water Standards and Health Advisories, a set of tables that are updated periodically. These standards, covering some 90 contaminants, are enforceable under the authority of the Safe Drinking Water Act. They are present as maximum contaminant levels.
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