Chapter 15 Protecting The Enivronment

Pesticides are chemical that kill or control organisms that humans consider

are used to kill insects

are used to kill weeds

Pesticides can have negative effects◦ What are some examples?

◦ Resistance◦ Biomagnification

Producing More Food

Synthetic Fertilizers contains plant such as nitrates.

Fertilizers are used to improve the yield of crops

Fertilizers can also cause eutrophication, which is a build up of in the water

Producing More Food

As human population increases, so does the demand for energy.

In Alberta, most of our energy is produced from .◦ Burning fossil fuels produces a lot of

Carbon dioxide forms a blanket over the Earth and traps heat

Producing More Energy

Page 298◦ Questions 1-5

Producing More Energy

Life has changed a lot because of refrigerators and freezers◦ These appliances use a compressor, a motor, and

a liquid called a

Refrigerators used to use CFCs (Chloroflorocarbons), however we have found out that they are harmful to the

What is the ozone layer?

Producing More Products

Why do we produce so much more waste per individual than we did 25 years ago?

3R’s : Reduce, Re-use, Recycle

Why So Much Waste?

Look at page 304-305, what can we do?

What Can We do?