A hurricane is a ______________________wind or storm. (violence) It was a _____________________disaster. (terror) The _________________made by the fire was awful. (destroy) It is __________________to be near the crater of volcano. (danger) ______________disasters can damage houses and kill people. (nature) Emergency _______________do their best to save people. (work) Sometimes situations are very _________________ to solve.(difficulty) The ocean is polluted with __________ waste. (chemistry) We should solve ________________problems. (environment) Air ______________is very dangerous for people. (pollute) The _______________of scientists are alarming. (predict) The earth has given us _____________ for thousands of years. (support) The hurricane did a lot of _______________ to the house. (damage) What are the most serious __________________problems now? (ecology)