green paper head with leaf instead of brain, eco natural background, environmental protection

green text circle drawing font pattern art design poster sketch brand cartoon leaf organ number yellow label flower logo paper head brain eco natural background environmental protection flat creative concept head silhouette brain profile icon mind face vector idea symbol concept think business design people thinking person ecology eco sign green art love environment copy space empty leaf nature natural graphic human web avatar social community portrait wallpaper earth global world environmental sustainable globe ecological energy recycle organic recycling