i like the music of serge beynaud because he can sing very well. he is a singer that i really love! it's not like here. for example, children in other countries have fresh milk. and we don't. our generation has it easier than our parents did. we children have it easier. they lived in different circumstances. we have mobile phones. they didn't exist back then. >> time now for our global ideas series, when we meet people dedicated to conserving our natural world. this week we head to lake skadar in the balkan peninsula, the largest lake in southern europe. reporter kerstin schweizer met conservationists keen to protect this natural paradise, and investors keen to develop it. and no wonder it's a bastion of freshwater biodiversity and one of the largest bird reserves in europe. how come i've never heard of this lake? situated between montenegro and albania, lake skadar is the largest inland body of water in the balkans. it's deserted. villages are few and far between. it's just a vast expanse of unspoilt nature. >> ?skadar lake is the home of more than 280 different species of birds. s