填空题
| Agricultural practice | Environmental damage that may result |
| ·19 | ·Deforestaton |
| ·20 | ·Degraded water supply |
| ·More intensive farming | ·21 |
| ·Expansion of monoculture | ·22 |
A Abandonment of fallow period
B Disappearance of old plant varieties
C Increased use of chemical inputs
D Increased irrigation
E Insurance against pests and diseases
F Soil erosion
G Clearing land for cultivation