Below is a Powerpoint presentation from the OpenAir Laboratory (OPAL) project giving an introduction to lichens and air pollution. Click on the forward and back arrows to move through the slides. Click on the "Full Screen" icon (bottom right of the Powerpoint window to show the presentation Full-screen (press "Esc" on your keyboard or click on the icon again to exit Full-screen mode).
View more presentations on lichens.
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