how can acid rain be reduced bbc bitesize
Answers
Acid rain damages the waxy layer on the leaves of trees. This makes it more difficult for trees to absorb the minerals they need for healthy growth and they may die. Acid rain also makes rivers and lakes too acidic for some aquatic life to survive.
Lichens can be used as biological indicators of sulfur dioxide pollution. They grow in exposed places such as rocks or tree bark, which means they easily absorb water and nutrients to grow there. Rainwater contains just enough nutrients to keep them alive. Air pollutants dissolved in rainwater, especially sulfur dioxide, can damage lichens and prevent them from growing. This makes lichens natural indicators of air pollution. For example:
bushy lichens need really clean airleafy lichens can survive a small amount of air pollutioncrusty lichens can survive in more polluted airIn places where no lichens are growing it is often a sign that the air is heavily polluted with sulfur dioxide.