🌿🌿🌿Environmental Pollutants –ALL type Quick Facts for PYQ Based Exams Imp for 2025 Exam *Pdf* available for paid💰 students in हिंदी & English medium *इस टॉपिक को हिंदी में इस Channel लिंक पर क्लिक कर पढ़े* https://whatsapp.com/channel/0029VaoD5q3FCCobLavfmC0y/3926 👉 Air Pollutants – 👉 Water 💧 👉Soil 👉 Noise *Air* --- 1. CO (Carbon Monoxide) Source: Incomplete combustion (vehicles) Effect: Forms carboxyhemoglobin in blood → reduces oxygen supply → silent killer 2. SO₂ (Sulphur Dioxide) Source: Coal combustion, thermal power plants Effect: Causes acid rain, respiratory issues 3. NOx (Nitrogen Oxides) Forms smog (photochemical) with VOCs Contributes to acid rain 4. Particulate Matter (PM10, PM2.5) PM2.5 is more dangerous (penetrates deep into lungs) Major sources: Vehicles, industries, construction dust 5. Lead (Pb) From: Batteries, paints, e-waste Affects: Nervous system, especially in children 6. CFCs (Chlorofluorocarbons) Source: Refrigerators, ACs, aerosols Effect: Depletes ozone layer Controlled under: Montreal Protocol (1987) UGC --NET / JRF ASST PROFESSOR 2025 . . Send Your Subject & Medium to get notes   WhatsApp link click 👇👇👇 👉 *For English Medium Students* https://wa.me/+919216009964?text=Send_me_notes_my_subject_is 👉 *हिंदी माध्यम स्टूडेंट्स के लिए* https://wa.me/+919257007505?text=Send_me_notes_my_subject_विषय_है 7. Ozone (Tropospheric) Secondary pollutant (formed from NOx + sunlight + VOCs) Key component of photochemical smog 🔵 Water Pollutants – MCQ Facts 1. Nitrates & Phosphates Cause eutrophication → algal bloom → kills aquatic life 2. Mercury (Hg) Causes Minamata disease From industrial waste, especially chlor-alkali plants 3. Arsenic (As) Present in groundwater (esp. West Bengal, Bihar) Long-term exposure → skin cancer 4. Pathogens (E. coli, viruses) Cause waterborne diseases (cholera, typhoid) From untreated sewage 🟤 Soil Pollutants – Exam Focus 1. DDT – Banned in many countries Accumulates in food chain → biomagnification 2. Heavy Metals – Lead, Cadmium, Chromium Cause soil infertility and enter food crops 3. Plastic – Non-biodegradable Major cause of land pollution 🟠 Noise & Radioactive Pollution – Key Points 1. Noise Pollution Unit: Decibel (dB) Safe limit: Below 55 dB (day), 45 dB (night) 2. Radioactive Pollutants Sources: Nuclear plants, weapons, medical waste Causes cancer, genetic mutations Notable incidents: Chernobyl (1986), Fukushima (2011) Important Protocols & Events (Frequently Asked in UGC NET Exam) Event Year Focus Stockholm Conference 1972 First global environmental summit Brundtland Report 1987 Defined "Sustainable Development" Montreal Protocol 1987 Control of CFCs Kyoto Protocol 1997 Greenhouse gases, binding targets Paris Agreement 2015 Limit global warming to 2°C Get pdf notes click here https://wa.me/+919216009964?text=Send_me_notes_my_subject_is