. ♪ >> my mother is vice-principal at koh andet high school. my father is a farmer. got four cows of his own. >> i've got a better future ahead than my grandparents. they didn't go to school. today, there's so much technology that makes life easier. ♪ >> when it comes to modern music, my favorite are love songs. but i also like traditional cambodian music -- like for dancing to. ♪ >> the biggest global problem are illegal drugs. some children don't go to school because of them. drugs destroy society. ♪ >> i'm happy when i get good marks in school. then i can go out late with my friends without my parents getting annoyed. ♪ anchor and now to our "global : ideas" series. this is when we meet people who are working hard to preserve biodiversity. today we head to the west coast of madagascar, home of the lemurs. this is where the extraordinary baobab trees can be found. they should really be surrounded by dense forest, and there's decreasing amounts of that in madagascar. our reporter, michael wetzel, travelled to kirindy to meet german scientists based there. they've be