inter- semi- over- dis- co- under-
-act
interact
believe ... humanity
believe in
... money / awareness
raise
powódź
flood
distributor
distribute
-appear
disappear
set ... a campaign
set up
... money / clothes
donate
bezrobocie
unemployment
volunteer
volunteer
-cook
overcook
really care ... the ecology
care about
... the lives / a situation
transform
bieda
poverty
competitor
compete
-operating
co-operating
protest ... the whaling industry
protest against
... an issue / a problem
address
susza
drought
donate
donor
-permanent
semi-permanent
we are relying ... you
relying on
... poor people / developing countries
aid
wycinka lasów
deforestation
raise funds
fund-raiser