For this you have visits farms from where most of the vegetables are coming to your home. Unless you see what is actually happening around, it is not possible understand the severity of the problem. We are actually been served with vegetable grown with poisonous water coming out of sewer or sewerage drains. This water is extremely poisonous in nature and vegetables grown out of this water has toxins and dangerous chemicals which has extremely adverse effect on our health and leads you to some incurable diseases.
For your quick reference please check following news articles and videos we have collected for your awareness:
Some news links for your quick reference:
1. Etv Bharat , Delhi NCR
https://www.etvbharat.com/hindi/delhi/city/delhi/vegetables-are-grown-in-delhi-with-dirty-sewer-water/dl20200218031628101
2. ZEE news , Delhi NCR
https://www.zeebiz.com/india/video-gallery-farmers-use-toxic-drain-water-for-growing-vegetables-in-delhi-s-mungeshpur-village-105680
3. Times of India , Delhi NCR
https://timesofindia.indiatimes.com/city/delhi/farmers-use-toxic-drain-water-to-grow-veggies-in-north-west-delhi/articleshow/70200212.cms
4. NDTV, Delhi NCR
https://swachhindia.ndtv.com/vegetables-grown-in-yamuna-floodplains-contaminated-with-toxic-heavy-metals-reveals-neeri-36230/
5. The Tribune, Punjab
https://www.tribuneindia.com/news/jalandhar/health-hazard-here-fruits-veggies-are-grown-in-dirty-water-262654
6. Dainik Bhaskar , MP https://www.bhaskar.com/news/MP-OTH-MAT-latest-bhind-news-021005-3694737-NOR.html
Some videos for your reference:
1. Times of India, Delhi NCR
https://m.timesofindia.com/videos/city/delhi/why-vegetables-grown-near-yamuna-are-bad-for-health/videoshow/67818140.cms
2. NDTV, Delhi NCR
3. Zee News, Delhi NCR
4. India TV