On the occasion of envoirnment day your school has planned to launch a campaign to sve trees . Make a poster in order to promote planting trees and save them from being cut down for urbanisation. You may highlight the need for growing trees,their role in mintaining the fine ecological balance and controlling pollution,some of their uses.you can mention how children can pledge to protect trees in our neighbourhood ,plant saplings on their birthdays or gift saplings along with their other gifts to friends and relatives on occasions. Use your imgination and think of an appropriate,catchy slogan and add visuals too.the issusing authority nay be 'friends of trees '