vagyanik upkaran pradushan ke karan - 1. Ve sabhi newtam technology per nirbhar rehte hai Jo vayuma ndal ko dushit karte hai. 2.In upkarno ke upyog se kuch dushit vayu ka prasar hota hai jaise CFC.. 3.In upkarno me electricity ka anuchit upyog hota hai.. I hope this will help you...
