How much additional oil can be recovered during secondary production?

   The window through which we view our world and existence is called our:

    Ocean tuna eat smaller fish that consume material containing mercury. Mercury is a persistent toxin that builds up in higher amounts in the bodies of fish. The mercury in the smaller fish accumulates in the ocean tuna in higher amounts. When we consume tuna, the mercury in the tuna can accumulate in our bodies in higher amounts. This phenomenon is called:

    What is the MOST likely reason that more communities do not use the potable water stored in confined aquifers?

   On the Galápagos Islands, the finches that Darwin studied tended to have either small beaks or large beaks. The smaller beaks are best at eating soft seeds but are ineffective at cracking large seeds. The larger beaks are best at cracking hard seeds. Beaks of intermediate size are inefficient for either seed type. Which result of natural selection is at work in this example?

   _____ is one of the most common chronic childhood diseases in the United States and other developed nations and a major cause of childhood disability.

   Which statement related to the health consequences of air pollution is FALSE?

   What percentage of the world’s population breathes polluted air?

  The EROEI must be _____ for any fuel to be worth harvesting.

    In making a transgenic organism, what is typically the role of the bacterium?