Jalvaayu Parivartan

Class 7 Social Science · Chapter 3: Bharat ki Jalvaayu · NCERT Exploring Society: India and Beyond section 3.5

Seekho

Jalvaayu parivartan matlab jalvaayu mein bade, lambe badlaav: taapmaan, baarish aur charam ghatnaayein. Laakhon saal praakritik prakriyaayein isse chalaati, par 19vi sadi se mukhyatah insaani gatividhiyaan: jeevashm eendhan (praacheen dabe jeevon se bane koyla, tel aur gas) jalaana, jangal kaatna, haanikaarak udyog aur barbaad karne wala upbhog.

Carbon dioxide aur doosri green house gaisein Sooraj ki garmi faslaati. Thoda ye Prithvi ko jeevan laayak garam rakhta, par kuch sadiyon mein humne bahut zyaada chhodi, jisse vaishvik taapan. 2025 ki shuruaat mein Bharat saamaanya se 1–3 °C garam tha aur sardi asaamaanya roop se chhoti aur halki, fasal aur chhote udyog prabhaavit. Hims-nadiyaan tez pighalti, lu aur moosaladhaar baarish zyaada.

Hum utsarjan ghataakar, ped lagaakar, solar-pavan jaisi navikarneey oorja se, bijli bachaakar aur tikaau jeevan jeekar jalvaayu parivartan ka shaman (dheema) kar sakte, aur lacheelapan bana sakte taaki samudaay jaldi sambhlen. Ye kadam kabhi tez vikaas aur zyaada upbhog ki chaah se takraate, isliye sarkaar se parivaar tak har star par chunaav maayne rakhte. Meher ki class "band karo" abhiyaan aur school ki paudh-shaala shuru karti.

Explore: jalvaayu ki madad ya nuksaan?

1. Har kaam sort karo.

Yaad rakho

• Jalvaayu parivartan mukhyatah jeevashm eendhan aur van-kataai ki green house gaison se.
• Shaman (navikarneey, ped, oorja bachat) aur lacheelapan isse jhoojhne mein madad.

Quick check

Haal ke jalvaayu parivartan ka mukhya insaani kaaran?

1. jeevashm eendhan jalaakar green house gaisein chhodna
2. ped lagaana
3. solar oorja
4. varsha jal sangrah

Socho

Jalvaayu parivartan mein yogdaan ghataane ko tumhaara parivaar teen kya badal sakta?

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.