HS+EVS+II

__**ENERGY FLOW IN ECOSYSTEM**__



= = =**Freshwater ecosystems**=

**Water**

 * AIR**
 * ACID PRECIPITATION**


 * what causes air pollution**
 * AIR, NOISE, AND LIGHT POLLUTION**


 * CHAPTER 13**
 * SECTION 2 THE OZONE SHIELD**

=**Food and Agriculture**=

=**Non Renewable resource**= =**Fossil Fuels**=