Garbage In, Garbage Out
Overview
Every day, waste comes out of every house — vegetable peels, paper, plastic, broken utensils. Where does all of this go? This is not just dirt, it is a mistake — because waste that leaves our home either pollutes the land or gets turned back into something useful. Let us learn about this.
Typed Notes
Two Families of Waste
(1) Biodegradable waste — which decomposes quickly (within a week or two): vegetable and fruit peels, leaves, paper, dairy products, food. Bacteria and worms break this down — and it turns into manure in the soil. (2) Non-biodegradable — which does not decompose for years and years: polythene (500 years!), plastic bottles, glass, aluminium foil, tin. Lying buried in the ground, it pollutes water and soil. Plastic is the biggest problem — every piece of plastic ever made still exists somewhere today.
Composting and Vermicomposting
Instead of throwing away biodegradable waste, try composting: make a pit or box in your home's courtyard — add peels and leaves, cover with soil, add a little water — stir it every week. Within just a few weeks, it turns into soil-like manure (compost) — free gold for your plants. And for a faster method — vermicomposting: add red worms to the waste — they eat the waste and quickly turn it into manure. This works at home, at school, and on farms — everywhere.
Landfill and Recycling
The waste collected from cities is dumped into a large pit dug in the ground — this is called a landfill. The problem: it pollutes the land, contaminates water, and causes bad smell and flies. That is why we should try to send as little waste as possible to landfills. The solution is recycling — breaking down old things to make new ones: old paper → new paper (saving 1 tonne of paper saves 17 trees); plastic bottles → new bottles or fabric; glass → glass. At home, separate your waste into wet (moist) and dry — this makes recycling much easier.
3R — The Rule for Every Home
(1) Reduce — use less: use a cloth bag instead of polythene, a steel bottle instead of a plastic bottle, print less on paper. (2) Reuse — use again: store spices in old containers, keep dry fruits in old pickle jars, use old clothes as a mop. (3) Recycle — make new things from waste: put paper, plastic, and glass into the recycling bin. The order is important: first reduce (so that waste is not created at all), then reuse, then recycle. The most important step is — Reduce.
Key Concepts
Revision ke liye ek nazar — exam se pehle yahi padhna hai.
- 01Waste is of two types: Biodegradable — decomposes quickly (peels, leaves, paper); Non-biodegradable — does not decompose for years (plastic, polythene, glass).
- 02Composting: decomposing biodegradable waste in soil to make manure. Vermicomposting — making manure quickly using red worms.
- 03Landfill: the city's collected waste is buried in the ground — a place that causes pollution and disease.
- 04Recycling: making new things from old ones — paper from paper, plastic from plastic, glass from glass.
- 053R: Reduce (use less), Reuse (use again), Recycle (make new things from waste) — Reduce comes first.
Questions & Solutions
Pehle khud try karo — phir solution kholo. Yahi tariqa topper banata hai.
What is the difference between biodegradable and non-biodegradable waste? Give examples.
What is vermicomposting?
What is the 3R rule? Give an example of each R.
Why is plastic dangerous? What can we do about it?
What is a landfill and what problems does it cause?
How does recycling paper save trees?
Waste is of two types — biodegradable (decomposes and can be turned into manure through composting or vermicomposting) and non-biodegradable (plastic — stays for years). Landfills cause pollution; recycling turns waste into new things. Remember the 3R rule: Reduce, Reuse, Recycle — and Reduce comes first.
Chapter-end quiz
4 MCQsOption tap karo — turant pata chalega sahi ya galat, explanation ke saath.
Q1.Which of the following is non-biodegradable?
Q2.What is used in vermicomposting?
Q3.Which R in the 3R rule comes first and is the most important?
Q4.What is the place where waste is collected and buried called?
Mark karo — dashboard par progress dikhega.