The most common source of infectious diseases in water supplies is:
a. algal blooms
b. sewage
c. surface runoff
d. none of the above (correct answer) (The most common source of infectious diseases in water supplies is water contaminated with fecal remains of humans or animals and pathogenic microorganisms)
Which of the following is a nonrenewable resource?
a. geothermal
b. solar
c. nuclear
d. biomass
A nonrenewable resource is a natural resource that we use and that can not be produced, so they are going to finish in some point.
