Between 1960 and 2010, atmospheric greenhouse CO2 has increased by
A. 80 ppm.
B. 400 ppm.
C. 320 ppm.
Answer: A
You might also like to view...
The greatest amounts of vegetable biodiversity loss in North America, and probably around the world, occurred
A) due to the Columbian Exchange. B) in the 19th century. C) in the 20th century. D) since the start of the 21st century.
What happens to different isotopes of oxygen in this figure?
A) Evaporation concentrates lighter isotopes in the resulting water vapor.
B) Precipitation forms ice that is enriched in heavier isotopes relative to seawater.
C) Melting of ice preferentially releases heavier isotopes back into the ocean.
D) All of these are correct.
During a major El Niño event, ____
A) record amounts of fish are harvested at the time of the winter solstice B) extensive ocean warming occurs in the eastern tropical Pacific C) eastern trade winds increase in strength D) extensive upwelling occurs in the eastern tropical Pacific
In the South in 2011, ________ percent of whites lived in poverty
A) 9.9 B) 10.4 C) 24.7 D) 26.7