Plastic bottles stacked into a bottle tower can be recycled to set up a vertical kitchen garden at home. The bottle towers are used for container gardening of vegetables and herbs. How to build such a tower is shown in different steps.

http://youtu.be/-uDbjZ9roEQ

There is no enough reason for not eating fresh veggies...even if you live in a skyscrapper. BTW for those who have balconies but hardly utilise them, this can make good use...