At Kyoto in 1997, what did the 30 Western industrialized countries legally agree to do?
A) voluntarily limit greenhouse gas emissions
B) finance further studies to determine the cause of climate change
C) reduce emissions of greenhouse gases by half
D) reduce emissions of greenhouse gases to 1990 levels
E) censure China for exceeding its carbon limits
D) reduce emissions of greenhouse gases to 1990 levels
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In food chains, energy moves from one source to the next, resulting in a loss of usable chemical energy to the environment. What is typically the amount of chemical energy transferred between trophic levels?
A. 5% B. 10% C. 15% D. 90% E. 100%
What is structural geology all about?
What will be an ideal response?
As oil becomes less available, secondary recovering methods will increase.
Answer the following statement true (T) or false (F)
In tropical regions the surface temperature of the oceans is high but decreases rapidly with depth between 300 and 1000 meters because ________
A) rapidly upwelling cold currents occur in these regions B) tropical regions are areas of high rainfall and this rapidly lowers the temperature of seawater C) sunlight cannot penetrate much below the surface of the oceans D) cold water from the polar regions flows just below the surface E) volcanic activity on the seafloor is rare in the tropics