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endangered species 
save energy
get an education 
sea level
greenhouse gases
ice cap
child labour

1. Endangered spicies must be prohibited by people.2. Energy must be saved by factories.3. Education is got by young people.4. Sea level is being risen worldwide.5. Greenhouse gases are being grown because of road traffic.6. A lot of land area is covered by ice cap.7. Child labour must be prohibited everywhere in the world.