If you fall into a crevasse, what is the maximum depth you are likely to fall?

Biodiesel ________

A) can be used in vehicles with diesel engines without engine modification B) is twice as expensive as petrodiesel C) produces more pollution than petrodiesel D) is widely used in the United States E) is produced from sugarcane

The earliest atmosphere of Earth was ____

A)essentially the same as our modern atmosphere B)composed entirely of nitrogen C)composed of ozone and hydrogen D)blown into space by solar wind E)composed entirely of ozone

In the United States, public transportation systems are

A) profitable. B) breaking even. C) operating at a loss. D) as extensive as those in Europe. E) changing the U.S. car culture.

________ water use does not divert or remove water from its source

Fill in the blank(s) with correct word