source: MrSkypelessons 2015年7月6日
http://www.skype-lessons.com/blog/
Potential threats
smog (air pollution)
deforestation
overpopulation
overconsumption (of finite resources)
extinction (of endangered species)
anthropogenic climate change
global warming
dumping of toxic (nuclear) waste
burning of fossil fuels
widespread flooding
genetically modified food
reduce carbon emissions (footprint)
carbon dioxide (CO2)
disposal of household waste (recycling)
(non) biodegradable
dire consequences
run out of coal, gas, oil
alternative (renewable) energy sources
solar power
wind farms
eyesore
tidal power
SEA
tide comes in / goes out (high/low tide)
coast
shore
estuary
peninsula
cove / bay / gulf
RIVERS
mouth
source
tributary
valley / ravine / gorge
MOUNTAINS
foot
peak / summit
ridge
glacier
