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________ is/are examples of secondary pollutants.

The best definition of a hypothesis is a(n)

A chemical that causes abnormalities in a growing fetus is called a(n)

In general, water use in poor countries is dominated by

Lauren, a U.S. citizen, enjoys many benefits stemming from administrative agency regulations. Lauren also owns her own business. As a business owner, Lauren is concerned about the high costs complying with these regulations imposes on her business. As a result, Lauren

Humid tropical forests have extraordinary biological diversity

Detection of toxic chemicals depends upon

The place where aquifers are most likely to be contaminated is at

Application of fertilizer to farm fields is an example of cultural eutrophication.

Pathogenic organisms are those that are susceptible to diseases.