Pokud nevidíte toto video, váš prohlížeč nepodporuje HTML5 videa
To view this video please enable JavaScript, and consider upgrading to a web browser thatsupports HTML5 video
BREAK DOWN OF THE 1992 UNITED NATIONS EARTH SUMMIT. VIDEO QUALITY NOT THE BEST BUT THE ONLY BREAK DOWN AS SUCH I COULD FIND. VERY GOOD INFORMATIONÂ