| Other Title | Our changing Earth / |
| GMD | Book |
| Language | E |
| Classification | G |
| Publisher | National Geographic Society, Washington D. C., 1994 |
| Subject | Conservation of natural resourcesEnvironmental degradation --Citizen participationEnvironmentalismNature --Effect of human beings on |
| Topic | Conservation of natural resourcesEnvironmental degradation --Citizen participationEnvironmentalismNature --Effect of human beings on |
| Description | 199 p.;col. ill.;27 cm.; |