英文關鍵字
agriculture
antics
caper
change
climate
copy
crisis
desiccation
disaster
drought
dry
drying
dust
dusty
environmental
extreme
flow
gauge
global
heat
hot
land
level
limited
line
low
natural
out
period
protection
rain
rainfall
reduced
resource
restricted
restriction
rhine
river
riverbank
riverbed
shipping
shortage
space
summer
sunny
tide
traffic
warming
water
weather