Water polluted by a farmer's poor irrigation control of fertilized lands is an example of
A) nonpoint source pollution.
B) point source pollution.
C) biochemical oxygen demand pollution.
D) municipal sewage pollution.
E) industrial pollution.
Answer: A
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Large reserves of ____________________ are located in Canada and are now considered to be conventional oil reserves, second only in size to those in Saudi Arabia
Fill in the blanks with correct word
What is the particular significance of valence electrons?
a) The number of valence electrons is the atomic number for that element b) Unlike electrons in other shells, valence electrons have no charge c) The number of valence electrons defines the type of element d) Valence electrons always balance the charge produced within the nucleus e) Valence electrons form chemical bonds between atoms by being transferred or shared
Steel and chemical industries are major water polluters primarily because they
A) are major users of municipal sewage systems. B) release runoffs of pesticides. C) generate large amounts of wastewater. D) require small amounts of water in the manufacturing process. E) generate superheated steam.
The fragmentation of natural habitats in the conversion of land for human uses creates
A) more opportunities to preserve wildlife in many small parks. B) focused regions where careful wildlife management can actually increase biodiversity. C) habitats that favor species that grow slowly or have naturally unstable populations. D) habitat breaks that favor species that thrive at the edges of ecosystems.