英文關鍵字
acid
chemicals
close
closeup
contamination
damage
diseases
drop
dying
earth
ecological
ecology
environment
environmental
fungicide
gardening
herbicide
insecticide
insects
kill
leaves
medicine
nature
pesticide
poison
pollute
pollution
prevention
problems
protection
protective
rain
rainforest
remedy
rust
scab
scientist
sick
spot
spray
sprinkle
test
testing
toxic
treatment
unhealthy
up
watering
weedkiller