aluminum
アルミニウム
alcohol
aluminum can
beer
can
carbonated water
carbonic acid
cg
drink
drinking water
ecology
electric power
electricity
empty can
energy
energy problem
environment
environmental problem
garbage
garbage collection
generating capacity
juice
materials shortages
panel
photovoltaic generation
power generation
problem
recycling
renewable energy
reproduction
resources
resources problem
set
solar
solar panel
steel
steel can
sun
sunlight
sunlight panel
water