What are other types of pollution that harm rivers?

In one line

The rule

Pollution is the addition of harmful substances to the environment, making it unsafe or unhealthy for living things.

Let's understand it simply

Imagine you are playing cricket near a river. You see plastic bottles, dirty water, and dead fish floating. This happens because many things—like chemicals, waste, and plastic—get mixed in the river. These things are called pollutants (harmful substances). They make the river water dirty and dangerous.

How it works

1. Factories release dirty water with chemicals into rivers.
2. People throw plastic, garbage, and other waste into rivers.
3. Farms use fertilizers (plant food) and pesticides (insect killers) that wash into rivers when it rains.
4. Sewage (dirty water from homes and toilets) often goes straight into rivers without cleaning.
5. Oil and fuel from boats or accidents can spill into rivers.

The story behind it

As cities and industries grew, people noticed rivers becoming dirtier. Scientists and local people saw fish dying and water smelling bad. They started studying what was causing the problem and found many types of pollution harming rivers.

Where you see it in real life

• Ganga river near Kanpur: Factories release chemicals and dyes, making the water unsafe.
• Yamuna river in Delhi: Sewage and garbage from homes pollute the water.
• Plastic bags in village streams: People throw plastic waste, which chokes fish and blocks water flow.
• Fertilizer run-off in Punjab: Rain washes chemicals from fields into rivers, causing green algae to grow.
• Oil spills from boats in Kerala backwaters: Oil forms a layer on water, harming fish and birds.

Why it matters

• Polluted rivers can cause diseases like cholera and typhoid in people who drink or use the water.
• Fish and other river animals die or become unsafe to eat.
• Farmers cannot use dirty river water for crops.
• Polluted rivers spoil the beauty and culture of holy places.

Common mistakes

• Thinking only garbage is pollution: Chemicals, sewage, and oil are also major pollutants.
• Believing river water is always safe if it looks clean: Some pollutants cannot be seen.
• Ignoring small streams: Even small water bodies can be polluted and harm bigger rivers.

Remember it

Rivers can be harmed by many types of pollution—not just garbage, but also chemicals, sewage, and oil.