A few days before a major earthquake in China, one village in the area reported the streets were filled with migrating toads that might have indicated the impending event
Indicate whether the statement is true or false
TRUE
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What residue of oil is the longest lasting in the environment?
a. tar balls b. volatile components c. oil sheens d. evaporative aromatic compounds e. slicks
Why are harmful algal blooms, or HABs, so dangerous?
A) They block light from reaching other photosynthesizers. B) They can produce potent toxins. C) They clog fish gills. D) They absorb sunlight, raising the water temperature.
Over the last 275 years, the relative sea-level rise in Venice has been
A) about 120 centimeters. B) about 70 centimeters. C) about 50 centimeters. D) about 30 centimeters.
Which type of sewage treatment is properly matched with its process?
A. primary - biological process B. secondary - mechanical process C. advanced - physical and chemical processes D. secondary - chemical process E. primary - chemical process