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温室效应(1/7)歌词

Good morning. Today's lecture is about the Greenhouse Effect. The “greenhouse effect" often gets a bad rap because of its association with global warming, but the truth is we couldn't live without it. First, I'd like to ask you what causes the greenhouse effect. Life on earth depends on energy from the sun. About 30% of the sunlight that beams toward Earth is deflected by the outer atmosphere and scattered back into space. The rest reaches the planet's surface and is reflected upward again as a type of slow-moving energy called infrared radiation. As it rises, infrared radiation is absorbed by greenhouse gases such as water vapor, carbon dioxide, ozone and methane, which slows its escape from the atmosphere. Although greenhouse gases make up only about 1% of the Earth's atmosphere, they regulate our climate by trapping heat and holding it in a kind of warm air blanket that surrounds the planet. This phenomenon is what scientists call the “greenhouse effect."


早上好。今天的演讲内容是关于温室效应。由于全球变暖的关系，“温室效应”变得臭名远扬。但事实上我们的生活离不开它。首先,我想问你是什么原因导致温室效应的?地球上的生命依赖于来自太阳的能量。大约30%的太阳光照向地球，受外层大气影响偏转并散射回太空。其余的太阳光照在地球表面，作为一种缓慢移动的能量---红外辐射再反射到太空。红外辐射在上升过程中被“温室气体”吸收,如水蒸气、二氧化碳、臭氧和甲烷，从而减慢其在大气层消失的速度。虽然温室气体只占地球大气的1%,它们却通过隔离热量并储存在一种围绕着地球的热空气层里来调节气候。这种现象是科学家们所谓的“温室效应”。
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