英文關鍵字
ash
atmosphere
biology
botanical
change
climate
damage
dead
disease
drought
earth
effect
examining
failure
farmer
farming
farmland
foliage
global
grain
greenhouse
grow
growing
growth
harvest
heat
illness
inspection
land
lush
male
mature
meadow
person
planet
popocatepetl
rain
stem
summertime
sunlight
temperature
touching
vegetable
volcanic
warm
warming