To meet the Clean Air Act Amendments of 1990,
A) the EPA will no longer strictly enforce NAAQS standards.
B) each state must develop a strategy to meet NAAQS standards for all major pollutants.
C) state implementation plans apply only to sulfur and nitrogen oxide emissions.
D) states with large industrial air pollutant emissions are exempt from EPA scrutiny.
B
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The total amount of living material in an ecosystem is referred to as:
a. biomass. b. food web. c. both biomass and food web d. trophic total.
The genes of an organism make up its ________, and the traits of an organism make up its ________.
A. phenotype; genotype B. genotype; phenotype C. phenotype; chromosomes D. enzymes; genotype
What caused our solar nebula to contract and spin, eventually creating the planets?
A) Gravitational interactions between particles B) Gravitational attraction from black holes C) Nuclear fusion joining atomic particles D) Solar winds from nearby stars
Remote sensing is
A) a subjective determination of temperature. B) the monitoring of a distant object without physical contact. C) an earthbound technique not used in modern satellites. D) based on the principle that surfaces must be physically handled and directly measured for study.