Rather than waiting for the authorities to make public gardens, or being envious of those who have their own green spot, why not plant your own neighbourhood garden for every one to enjoy? Guerilla gerdening is a global phenomen, and a nice way of local action for joy and practical use. 

Find some inspiration here:

http://www.guerrillagardening.org/
http://thepotholegardener.com/ 
http://www.guerrillagardening.org/onguerrillagardening.html
http://www.primalseeds.org/guerrilla.htm 
http://www.goodatmagic.com/ggmedia/gg_bbcradio416nov10.mp3  (radio)
http://geriljahage.wordpress.com/ (in Norwegian)