Nowadays, the life of many people in the world is{#blank#}1{#/blank#}(affect) by globle warming. For example, greenhouse gas has a bad effect{#blank#}2{#/blank#}both people and environment. The earth's surface temperature{#blank#}3{#/blank#}(go) up by about 1 degrees centigrade in the past100 years. As a matter of fact, we may feel that we can hardly put up with the extremely hot summer and we can't get accustomed to warm winter. The rise of the earth's surface temperature has made much {#blank#}4{#/blank#}(different) to human health, the existence of creatures {#blank#}5{#/blank#} the balance of ecosystems. There is no doubt that it is human activities that result{#blank#}6{#/blank#}the bad environment. As a {#blank#}7{#/blank#}(consequent), conditions permitting, all countries in the world should try their best {#blank#}8{#/blank#}(improve) our environment. Even if our effect is limited, it will{#blank#}9{#/blank#}(eventual) make a great difference if we keep on{#blank#}10{#/blank#}(work) together to deal with global warming. Without all people's joint efforts, what would our future be like?

    A few people have lucid (清醒的) dreams, in {#blank#}1{#/blank#} the dreamer is aware they're dreaming and can control the experience. Some others can learn {#blank#}2{#/blank#} (have) lucid dreams. The practice can be used to deal with frightening dreams. However, its potential has been limited by it often {#blank#}3{#/blank#} (be) so hard to achieve. Now, researchers have developed the most effective method yet for promoting lucid dreams.

    The researchers let 121 adults aged 19 to 75 pick something {#blank#}4{#/blank#} (see)in a previous dream. It was called a "dreamsign" that can serve {#blank#}5{#/blank#} a reminder to become lucid when met again. The {#blank#}6{#/blank#} (volunteer) were then handed capsules. Each person got a high-dose (大剂量的) capsule, a low-dose capsule and a placebo (无效对照剂) capsule, but they couldn't tell which was which. On three occasions, they woke in {#blank#}7{#/blank#} middle of the night, took a capsule, imagined their dreamsign and went back to sleep. The high dose was most effective, causing lucid dreams in 42 per cent of participants. About 27 per cent {#blank#}8{#/blank#} (report) lucid dreams with the low dose and 14 per cent after taking the placebo capsule.

    The potential applications are {#blank#}9{#/blank#} (excite). "This new method has the success rate we need to be able to {#blank#}10{#/blank#} (proper) do research on lucid dreaming," says Denholm Aspy at the University of Adelaide in Australia.