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The mining project threatens one of the world's richest areas of __________.

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Visitors can wander around here without difficulty because most of the antique area is now a pedestrian __________.

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The holiday cottage has many green touches, including __________ cleaning products.

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The Saudi government is investing billions in __________ to support the enormous influx of people in Mecca.

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We must improve the environment through __________ design and greener buildings.

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All fossil fuels are ______ resources that cannot be replaced after use.

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Some people think that in order to deal with the problem of congestion in cities, ______ vehicles should be banned in city centres while others consider this to be an unrealistic solution.

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The war has badly damaged the country’s ______.

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New York City is expected to increase its ______ energy capacity by 50% by 2050.

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Many researchers claim that yoga practice and physical activities can improve people's ______ of life.

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This new kind of pizza tasted ______, so I gave up eating it.

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Pollution will reach to ______ levels in the future if we don't develop cleaner power sources to replace instead.

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The smell is very familiar ______ everyone who lives near a bakery.

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Barbara's husband, Mark, is working for Eco Infrastructure Network, whose main function is to ______ urban environmental problems to make Superstar City greener, cleaner and more sustainable.

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There are still safety concerns and ______ that need to be addressed before we can make that a reality.

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People's lives will continue to be threatened ______ the continuous risk of earthquakes and tsunamis here.

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Hana ______ lonely because she doesn't have any good friends in this new city.

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This rapid growth of the population has caused daunting problems for city planners, such as ______ roads.

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Eco-friendly transport systems will reduce greenhouse gas ______.

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In addition, more ______ zones for walking and cycle paths will be made available for people in all neighbourhoods.