All living things need water to live. Rain is very important for life because, rain brings us the water we need. But in many places in the world even where you live, rain has become a threat.
The rain water polluted with poisonous and acidic gases is called Acid Rain. Most of the acid gases are blown into the sky, and when they mix with the clouds it can cause rain to become more acidic.
E.g. – Lemon juice, vinegar are all acidic. Rain is naturally acidic, but acid gases make it even more acidic, sometimes as acid as lemon!
1) Nitrogen oxide
2) Sulphur dioxide
1) Burning of fossil fuels like coal and oil.
2) Motor vehicles
3) Electricity generation
6) Use of engines and machines
7) Volcanic eruptions (Nature can also produce acid gases, such as volcanoes. When they erupt, the smoke that comes out of the crater is also full of acid gases.)
1) Air pollution can be carried all over the world.
2) When acid gases are released, they go high up in the sky.
3) Then they are pushed by strong winds towards other countries.
4) When rain is acidic, it affects what it falls on.
The acid takes away important minerals from the leaves and the soil.
Aquatic animals like fish and aquatic plants may end up dying, because they cannot survive in acidic lakes.
Water we drink from taps can be polluted by acid rain, which can damage the brain.
Acid rain can also damage buildings and statues because the acid eats into metal, stone and plastics.
E.g. – The Statue of Liberty in the USA
Taj – mahal in India
Eiffel Tower in France
1) Humans, other animals and plants need heat or warm to live.
2) Sunlight warms land, water, and air.
3) In turn, the warmed-up land, water, and air give off heat, which rises up toward the sky (Warm air can rise).
4) Gases in the Earth’s atmosphere capture some of that heat and prevent it from escaping into space.
5) This heat trap keeps the ground, oceans and air at fairly safe, temperatures that thousands of plants and animals can bear it up.