Water pollution. How the water is polluted and is treated and made safe for the environment

To start with, watch this short podcast made by students, and then do the exercise.

 

Now, you can see the second part of our documentary. This video shows the process of cleaning waste water in the sewage treatment plant of Mostoles-El Soto.  Students comment the stages of the process: pre-treatment, primary, secondary and tertiary treatment and how we can use the sludges to produce energy.

 

 If you need some help you can find the podcasts' script here.

Human impact on ecosystems

Environmental problems, what would we do?

This video presents a conference about Growth and sustainable development. It is a very interesting point of view ant it shows evidences that should move us to change our habits and our feelings about life.

Ecology

If you want to review some concepts about Ecology, try this exercise.