Which of the following would most decrease the albedo of a city?
A. darker, rougher surfaces
B. darker, smoother surfaces
C. lighter, rougher surfaces
D. lighter, smoother surfaces
Answer: A
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A swimmer caught in a rip current should
A) swim out to sea to escape it. B) swim along the shore to escape it. C) swim straight back to shore to escape it. D) float along in the current until it loses energy and is easier to escape.
Cut-off cyclones feature intensifying precipitation
Indicate whether the statement is true or false
How have scientists determined that most of the CO2 increases have come from human burning of fossil fuels, rather than natural sources?
A) Carbon isotope analysis indicates the source is fossil carbon. B) There haven't been enough volcanic eruptions since the observed CO2 increases to account for the additional atmospheric carbon. C) Prior to the industrial revolution, CO2 concentrations were negligible, while other greenhouses gases dominated the atmosphere. D) Paleoclimatological reconstructions which show higher CO2 concentrations than pre-industrial times. E) CO2 concentrations are much higher in urban areas than in rural areas, indicating fossil fuels must be the source.