History 58 Modern dance 30 Nature 28 Effect of human beings on 27 Ballets 23 Choreographers 22 Documentary films 18 Mais ... Environmental aspects 18 Dance 17 Environmental degradation 17 Social aspects 16 Ballet 15 Video recordings for the hearing impaired 15 Dancers 14 Environnement 13 Environmental conditions 11 Environmental health 11 Histoire 11 Homme 10 Human evolution 10 Ballet dancers 9 Dégradation 9 Ecology 9 Influence sur la nature 9 Economic aspects 8 Environmental policy 8 Fashion 8 Human beings 8 Marine animals 8 Ocean 8 menos ...