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improve to improve improved improving
our natural surroundings are in danger of being destroyed by industry the fixed supply of natural resources marks a point beyond which economic growth cannot continue the world population is ever increasing more efforts should be made to improve the quality of our material life
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better use of greenspace facilities should be made so as to improve the quality of our life attention must be directed to the improvement of recreative possibilities the urban environment is providing more recreation activities than it did many years ago priority must be given to the development of obligatory activities
we should regard such entertainment as an important part of our cultural heritage. we should improve the entertainment in form and quality today. we should never underestimate the skills used by people in the 19th century. we need to make more people aware of this unique form of entertainment.
more efforts should be made to improve the quality of our material life the fixed supply of natural resources marks a point beyond which economic growth cannot continue the world population is ever increasing our natural surroundings are in danger of being destroyed by industry
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the seas we will depend on for future food have been more or less contaminated. the marine resources are directly bound up with our future life. the exploitation drives are essential for us to improve the quality of llfe on the earth. the ecological balance in the seas has nothing to do with that on the land.
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