In some countries , this recognition happens through a three level system , where schools are awarded either bronze and silver awards before receiving the International Green Flag .
Successful Eco-Schools are awarded the International Green Flag , an internationally acknowledged symbol for environmental excellence .
In some countries , this recognition happens through a three level system , where schools are awarded either bronze and silver awards before receiving the symbol     .
Successful Eco-Schools are awarded the International Green Flag , an internationally acknowledged symbol for environmental excellence .