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Are people happier in nature with blue
skies overhead and fresh green grass underfoot? Could noisy streets, {#blank#}1{#/blank#} (crowd) with cars and people, make us unhappy?
The World Health Organization estimates that 54 percent of the world's
population lived in urban areas in 2014. The WHO adds that that amount {#blank#}2{#/blank#} (increase) to 66 percent by 2050.
People often move to cities for{#blank#}3{#/blank#} (good) jobs and more
cultural activities. But are they putting {#blank#}4{#/blank#}(they) at risk?
Experts say that natural environments
or green spaces do a lot of good for our mental health.
Many studies have shown that nature can
calm us and make us feel happy. Nature, experts say, can also help us learn
better. And {#blank#}5{#/blank#} (experience) nature helps people recover from
the mental tiredness that {#blank#}6{#/blank#}(come) from day-to-day work.
Mental health experts
say some research suggests that city living might hurt our mental health, {#blank#}7{#/blank#} they cannot say exactly why. “What are the
specific{#blank#}8{#/blank#} (aspect) of the urban environment {#blank#}9{#/blank#}causes some people to develop mental
health issues?” asked AndraMechelli, a doctor at Kings College, London.
Researchers have found that being
outdoors, seeing trees, hearing birdsong, seeing the sky, and being {#blank#}10{#/blank#}touch with nature are associated with
higher levels of mental well-being.