Answer:
Lichens can be used as air pollution indicators, especially of the concentration of sulphur dioxide in the atmosphere. Lichens are organisms that grow in exposed places such as rocks or tree bark. They need to be very efficient at absorbing water and nutrients to grow there.
Basicity of an acid is the number of hydrogen ions which can be produced by one molecule of an acid
election circles the nucleus
Yes we would be able to live in cold climates.
