Photochemical smog is produced
A) when conditions for acid rain are at their peak.
B) when secondary pollutants are present.
C) only in industrial areas.
D) when sunlight transforms certain gasses and aerosols.
Answer: D
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From a biodiversity standpoint, which of these is a serious threat posed by plastic shopping bags?
A. They can be ingested by birds and animals. B. They can easily blow away and cover tree limbs. C. They don't degrade in landfills. D. They can get in water lines and block drains.
What is an earthquake? Under what circumstances do most large earthquakes occur?
What will be an ideal response?
The New Moon is immediately followed by the ________ phase of the Lunar Cycle
A) Full Moon B) Waning crescent C) Waning gibbous D) Waxing crescent E) Waxing gibbous
Chronically undernourished people's diets do not provide 2,200 kcal per day on a long-term basis.
Answer the following statement true (T) or false (F)