50 ke dashak me aur aaj ke parivesh me koan koan se badlav aye hain uske piche kya Karad hain spasth karte hue Apne vicharo me vyakt kre
technology is the most important part. and also generation gap.that time lake of resources . now we are able to understand by the past experinces and also success stories .path which are available on net .