Go to the EPA's Air Quality Index ( HYPERLINK "Http://www

question 66

Essay

Go to the EPA's Air Quality Index ( HYPERLINK "http://www.airnow.gov/" http://www.airnow.gov/).Look at the air quality for the area in which you live (both current and archived).Does any of this information surprise you? Now,research an area that you think would have a high level of air pollution and one that you think would have a low level.Do the results surprise you?

---

Definitions:

Guide Behavior

The process of influencing or directing actions and conduct through advice, instruction, or example.

Guard Cells

Specialized cells located within the epidermis of leaves, stems, and various organs responsible for controlling gas exchange and limiting water loss through the opening and closing of stomata.

Stoma

Pores found on the leaf and stem surfaces that facilitate gas exchange between the plant's internal tissues and the atmosphere.

Companion Cells

Specialized cells in the phloem of plants that support the function of sieve tube elements in transporting sugars.