28【高考英语一轮复习】题型一 阅读理解 主题练习 题组4 自然生态和环境保护 含答案与解析

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微生物对海洋颜色的影响

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8分钟 By the end of the century, if not sooner, the world’s oceans will be bluer and greener thanks to a warming climate, according to a new study. At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean’s appearance. Phytoplankton live at the ocean surface, where they pull carbon dioxide(二氧化碳) into the ocean while giving off oxygen. When these organisms die, t

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