against the law
aid
boil
cause
control
correct
incorrect
credible
incredible
developing world
dignity
dirty
drinking water
electricity
export
fair trade
figure
greenhouse gas
heating
however
logical
illogical
make a difference
on standby
perfect
imperfect
policy
polite
impolite
poverty
price
proper
proverb
remote
respect
skill
solar power
switch off
treat
visible
invisible
work for aliving