ParyavaranKhaga · Class 6-8
Bus stop pe dhuaan kahan se aata hai?
Bus stop pe khade ho aur ek purani gaadi kaala dhuaan chhodti nikal jaaye — aankh aur gala kyon chubhta hai?
Socho pehle… phir dekho jawab
Petrol-diesel jalne pe dhuaan banta hai jismein chhote-chhote kan aur nuksaan waali gases hoti hain. Yeh saans ke saath andar jaati hain aur aankh-gale ko pareshaan karti hain.
Gaadi ka engine petrol ya diesel jalata hai. Jalne se taakat milti hai, par saath mein dhuaan bhi nikalta hai. Is dhuaen mein carbon dioxide ke saath carbon monoxide jaisi zehreeli gas aur baareek kaale kan hote hain.
Jab ek shahar mein laakhon gaadiyan roz chalti hain, toh yeh dhuaan hawa mein jama hota hai. Sardiyon mein hawa dheemi ho jaati hai toh yeh dhuaan-dhund upar nahi jaata — isliye aasmaan dhundhla dikhta hai.
Hal kya? Chhote kaam ke liye paidal ya cycle, lambe kaam ke liye bus-metro, aur electric gaadiyan jinki tailpipe se dhuaan nahi nikalta. Par dhyaan rakho — EV ki bijli bhi kahin se banti hai, toh saaf bijli bhi zaroori hai.
Ghar pe try karo
Kisi safe jagah khade ho ke 5 minute mein guzarne waali gaadiyan gino: kitni car, kitni bike, kitni bus. Phir socho — ek bus mein jitne log hain, utne logon ke liye kitni car lagti?
Wow!
Ek bhari hui bus sadak se kai car ka kaam ek saath hata deti hai — kam gaadi, kam dhuaan, kam jam.
3 sawaal
- Gaadi ke dhuaen mein kaunsi zehreeli gas hoti hai?
Jawab dekho
Carbon monoxide. Carbon monoxide ek zehreeli gas hai jo engine ke dhuaen mein hoti hai.
- Electric gaadi ke baare mein kya sahi hai?
Jawab dekho
Us ki tailpipe se dhuaan nahi nikalta. EV battery ki bijli se chalti hai, uski tailpipe se dhuaan nahi nikalta.
- Hawa ka pradushan kam karne ka sabse aasaan roz ka tareeka?
Jawab dekho
Paas ke kaam ke liye paidal ya cycle. Paidal ya cycle se koi dhuaan nahi nikalta.
NCERT se jodo: NCERT Class 8 Science — hawa aur paani ka pradushan