A hurricane is a ____ wind or storm. The ____ made by the fire was awful. It is ____ to be near the crater of a volcano. ____ disasters can damage houses and kill people. Emergency ____ do their best to save people. The ocean is polluted with ____ waste. We should solve ____ problems. Air ____ is very dangerous for people The ____ of scientists are alarming. The earth has given us ____ for thousands of years. The hurricane did a lot of ____ to the house. What are the most serious ____ problems now?

Ecological problems

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