TY  - BOOK
AU  - Canby,Thomas Y.
TI  - Our changing Earth
U1  - 363.7 21
PY  - 1994///
CY  - Washington D.C.
PB  - National Geographic Society
KW  - Ambientalismo
KW  - Degradación del medio ambiente
KW  - Participación ciudadana
KW  - Naturaleza
KW  - Efecto de los seres humanos
KW  - Conservación de los recursos naturales
N1  - A planet under pressure. -The evolving environment. -The air we brethe. -the face of the earth. -A world of water. -The web of diversity. -keys to the future; P202; P201; P163; P162; P161; P160; P148; P147; P146; P145; P144; P143; P142; P141; P140; P139; P138; P137; P136; P135; P134; P133; P129; P128; P127; P120; P119; P118; P116; P115; P114; P110; P109; P108; P104; P103; P102; P99; P98; P97; P96; P95; P93; P90; P89; P88; P83; P82; P62; P59; P58; P57; P51; P49; P48; P47; P29; P24; P20; P19; P17; P15; P14; P12; P10; P09; P08; P07; P06; P05; P04; P01
ER  -