In Vancouver, a huge amount of coffee cups are use each day. If each person keep his own cups and put a seed in it with some soil or cotton, a lot of threes, plants or vegetables are going to grow in town, on balconies, in appartments. When they will become a little plant people will plant it in collective vegetable garden or just in their grass ! Everybody will have green fingers, even children who will be fascinate to look at the plants growing up each day !