1. Pollution Indicators How do you know if the air around us is polluted?
22 February 2019
Pollution Indicators
How do you know if the air around us is polluted?

2. Pollution Indicators 22 February 2019
By the end of the lesson I will be able to:
Recall that lichens can be used as pollution indicators

3. LICHENS – What they look like
Below: are three examples of lichens. They can look very different and there are many examples in our natural environment.
Right: is a picture of where you might see lichens in a woodland area – this single image shows many lichens and mosses.

4. LICHENS & AIR POLLUTION
A lichen is usually a partnership between fungi and algae. Sometimes, lichens are made up of fungi and cyanobacteria which is also known as blue-green algae. In either case, the organisms of a lichen co-exist in a symbiotic relationship where each benefits from the other.
"Old Man's Beard."
The fungi provides the physical structure of the lichen while the algae provides food for both itself and the fungi through photosynthesis.
Often, a lichen's importance in an ecosystem is overlooked. Most lichens are sensitive to air pollution and can often forecast problems in the environment. If the environment is too polluted, the lichen will disappear which is a strong warning and indicator of poor air quality.

5. Work to do
Design an information leaflet which will help someone to spot water pollution and air pollution

6. Plenary 22 February 2019 How have we done?
Recall that lichens can be used as pollution indicators
Interpret graphs to answer exam questions
Explain the causes and effects of global warming