| 000 | 01297nam a2200265Ia 4500 | ||
|---|---|---|---|
| 001 | 95476 | ||
| 003 | 0000000000 | ||
| 005 | 20211103231532.0 | ||
| 008 | 060607s1994 000 0 eng d | ||
| 020 | _a870449109 | ||
| 035 | _a(AEA)CB54E119B26349A9A9D176D78F874894 | ||
| 040 |
_aAEA _cAEA |
||
| 050 | _aR GE 195 .C160 1994 | ||
| 100 |
_aCanby, Thomas Y. _994773 |
||
| 245 | 0 |
_aOur changing earth / _cThomas Y. Canby ; prepared by the Book Division, National Geographic Society. |
|
| 260 |
_aWashington, D.C. : _bThe Society, _cc1994. |
||
| 300 |
_a199 p. : _bcol. ill. _c25 cm. |
||
| 520 | _aDiscusses factors which cause destruction to life on earth such as the following:deforestation,depletion of the ozone layer with its threat of harmful ultraviolet radiation | ||
| 520 | _aloss of reefs and wetlands,contamination of the air with emissions and the waters with pollutants and overpopulation . Discusses further the cause of the altered ecosystems namely:agriculture and industry and their hazardous effects to the earth and its populace. | ||
| 650 |
_aConservation of natural resources. _2sears |
||
| 650 |
_aEnvironmental degradation _2sears _93882 |
||
| 650 |
_aEnvironmentalism. _2sears _934067 |
||
| 942 | _cREF | ||
| 999 |
_c64957 _d64957 |
||