1. Reduce!
Reuse!
Recycle!
Neistadt
Biology
Natural Resources:
Conservation/Recycling/Pollution

2. Conservation
 *Conservation is the wise use of natural
resources to prevent them from being
used up.
 *People must work to make natural
resources last longer.
 *People must also make sure the use of
natural resources does not harm
ecosystem.

3. Composting
 *Composting- a method that recycles
food waste into fertilizer for soil.
 *In a compost pile, bacteria break down
plant material into fertile soil.
 This reduces the amount of solid waste
taken to landfills.

5. Reusing
 *Reusing items instead of throwing them
away saves resources.
 Examples:
 Old clothes used as rags or given away
 Empty bottles used as containers
 Cloth napkins instead of paper napkins
 Reusable lunch and drink containers instead
of throw away containers.

6. Recycling
 *Recycling- reprocessing a waste material
to be used again in a new product
 *Paper, glass, aluminum, plastics and iron
are often recycled
 *It takes less energy to recycle a material
than to create a product from brand new
materials

7. Recycling Aluminum

8. Review Questions:
1. How many times can aluminum be
recycled?
2. Why would a farmer benefit from
composting?
3. What items do you regularly recycle?

9. Recycling Facts:
 We can recycle many things, from
aluminum cans to cell phones!
 Check out this website for more info:
 http://recyclingfacts.org/content/fun-
recycling-facts

10. Soil Conservation
 *Contour farming is when crops are
planted along the slope of a hill. This
prevents soil from being washed away.
 *Planting trees as wind breaks can
prevent soil from being blown away.

11. Pollution
 *Air Pollution- burning fossil fuels can
pollute the air
 Smog is air pollution
 Carbon monoxide is a poisonous gas
produced by cars, trucks, factories and
cigarettes

12. Acid Rain
 *Acid Rain results when pollutants in the
air combine with water.
 *Acid rain is harmful to living and nonliving
things.

13. Acid Rain:
 Acid rain reduces
the amount of
calcium in the soil.
 Snails need calcium
for their shells
 Birds eat snails
 Bird eggs are low in
calcium
 Baby birds may not
hatch.

14. Acid Rain
 *Acid Rain is harmful because most organisms
need a neutral environment to thrive.
 For Example: Fish need a water pH ranging from 6
to 8.

15. *Acid Rain can destroy
buildings and statues.

16. Water Pollution
 *Water pollution reduces the supply of
clean water and harms organisms living in
the water.
 *Chemicals from pesticides, fertilizers,
factories, boats, cities, and homes are
washed into rivers and lakes
 Chemicals can also leak into the
groundwater.

17. Check your understanding
1. What are two ways to conserve soil?
2. How are acid rain and air pollution
related?
3. What are three kinds of water pollutants?
(see chart on page 383)