Important MCQs on Environmental Pollution, Ozone Layer-Its depletion and Greenhouse Effect

[@TabasumTabu-yp5vm]

78nitrogen and 21oxygen

[@LovelyMountainLake-hm8by]

acid rain is formed due to contribution of
sulphur dioxide(so2) and nitrogen oxide ( Nox)

[@AaqibAh-px7up]

Mashallah very good

[@pirsumaya9489]

Nitrc oxide(NO)
Sulper dioxide (so2)

[@Ritadevi-gu7uf]

⭐Oxygen at atmosphere is 21℅
⭐Carbon dioxide is 0.02℅
⭐Fresh water available at earth is 2.7℅

[@sabreenalone7735]

Thank you so much sir ❤

[@GazalaBano-tz1mm]

Thank u sir

[@hayatiyousuf9800]

Nice session 🍀

[@misba3718]

I hve seen u in every MCQ session 😊