Electrically charged atoms or combinations of atoms are called ________.

Use the figure above to answer the following question(s).A decrease of one unit in the pH scale represents a ________ the hydrogen ion concentration of a solution.

The results of overapplying fertilizer can include ________.

________ are examples of naturally occurring biological hazards.

Terracing, contour farming, intercropping, and crop rotation all ________.

Net primary productivity is ________.

The view held by both Malthus and Paul Ehrlich suggests that depletion of resource supplies due to greater numbers of people ________.

Most of the world’s forests are ________.

Which of the following countries has the highest population growth rate?

Malthus was responsible for ________.