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  • Carbon dioxide, or CO2, is the main greenhouse gas in climate change.

    二氧化碳是導致氣候變化的主要溫室氣體,

  • So how does CO2 get into our atmosphere?

    那麼二氧化碳是如何進入我們的大氣層呢?

  • Well, carbon is part of a cycle. It starts with the sun,

    嗯,碳是循環的一部分。它始於太陽,

  • which heats the Earth's surface with more energy

    太陽使地球表面的熱度提高, 其一小時所產生的能量

  • in one hour than the whole world uses in a year.

    比整個世界一年下來所使用的還要高。

  • Plants, which are kind of like biological chefs,

    植物,作為一個有點像生物廚師的角色,

  • take that sunlight, and then suck in some CO2 from the air,

    採取陽光,然後從空氣中吸入二氧化碳,

  • mix them together, and BAM!

    將它們混合在一起,接著砰!

  • They create a stored form of energy, in the form of carbohydrates

    它們在碳水化合物中創造一種貯存形式的能量,

  • such as glucose and sucrose.

    比如葡萄糖、 蔗糖,

  • The process is called photosynthesis.

    這過程叫作光合作用。

  • When animals like us eat those plants

    當像我們這種動物吃那些植物時,

  • our stomachs convert that food back into energy for our own growth.

    我們的肚子將食物轉換為成長所需的能源,

  • Greenhouse gases are a byproduct of this process,

    溫室氣體是這過程中的一個副產品,

  • and are released through waste.

    並且藉由廢物被釋出。

  • If those plants die, they decompose, and tiny microorganisms break down those carbohydrates

    如果這些植物死了,他們會腐爛, 小小的微生物會分解這些碳水化合物,

  • and again, release greenhouse gases as a byproduct.

    然後再次釋放其副產品——溫室氣體。

  • As you see, energy originates from the sun. It is then transferred as it moves through the food chain.

    如我們剛才看到的,能源來自太陽, 接著它透過食物鏈轉換形式。

  • But sometimes, carbon based organisms like plants or animals get stuck in the earth.

    但有時,根植於碳的有機體 會困在地球上,比如植物或動物,

  • When this happens, they're compressed under tons of pressure,

    當發生這種情況時,它們被壓縮在 好幾噸重的壓力之下,

  • and turned into carbon-based fossil fuels

    轉變為基於碳的化石燃料

  • like oil, coal or natural gas.

    像石油、 煤、或天然氣。

  • Since the Industrial Revolution, humans have been pulling those fossil fuels out of the ground

    自工業革命以來,人類把這些化石燃料從地底掘出

  • and burning them, activating the stored energy

    燃燒它們,啟動儲存的能量

  • to make electricity and power engines.

    以使電力和動力引擎運作,

  • But the thing is it also releases millions of years worth of stored CO2 back into the air.

    然而這便造成那貯留了數百萬年的 二氧化碳釋放回空氣中。

  • In addition, humans breathe in oxygen and breathe out CO2.

    此外,人類吸入氧氣,呼出二氧化碳,

  • But plants do the opposite.

    但植物卻相反。

  • Trees suck up huge amounts of CO2, which balances the cycle.

    樹木吸收大量的二氧化碳,這可以平衡循環。

  • Thus, deforestation reduces the plants that store CO2.

    因此,砍伐森林減少了貯存二氧化碳的植物,

  • We're attacking the cycle from both sides.

    我們正從雙方攻擊這個循環,

  • Think of it like a computer. A computer can operate a few programs at a time, right?

    這就像一台電腦。電腦可以 同時運行幾個程式,對吧?

  • Normally, when you've finished with a document, you save, and you close it,

    平常當你完成一份檔案,存檔然後關閉它,

  • so as not to overwork the computer.

    免得過度使用電腦。

  • Then, imagine you stopped closing your documents.

    現在想像一下你停止關閉檔案,

  • So they were all open at once.

    它們同時都開啓著,

  • Your computer wouldn't be able to process it all.

    你的電腦無法處理這一切。

  • It would start to slow down, and then to freeze, and eventually it would crash.

    它會開始慢下來,接著當機,最終崩潰。

  • Which might be where our environment is heading if we keep overloading the carbon cycle.

    倘若我們持續地過度負載碳循環, 這可能就是我們最終的環境結果。

  • So is there any way to rebalance the ecosystem?

    所以,有什麽辦法可以平衡生態系統?

  • What about technology? Technology is defined as a technique to solve a problem.

    科技?科技的定義是一種解決問題的技術。

  • And so, sustainable technologies are those whose output is equal to their input.

    因此,永續的科技是那些輸出等同於投入的技術。

  • They do not create negative externalities,

    它們不創造負面的外部成本,

  • such as CO2, in the present or the future.

    比如目前的、或將來的二氧化碳,

  • They sort of cancel themselves out to solve the problem.

    它們在某種程度上排除自己,以解決問題。

  • To achieve this, we need to invent sustainable technologies.

    爲了要實現這一目標, 我們需要創造永續的科技。

  • If we put all the ideas and technologies ever created into one circle,

    如果我們把所有得出的想法和科技匯成一個圈,

  • then invention is the pushing of the boundaries of that circle.

    然後,發明便是推動那圈子邊界的驅力。

  • And the area outside of the circle is infinite,

    那圓之外的區域是無窮的,

  • meaning the potential for invention is limitless.

    這意味著發明的潛力是無限的。

  • Think about some of the incredible clean technologies we have today. [Wind; Electric & Solar Cars; Biogas]

    想想我們今天所擁有的 令人難以置信的清潔能源。 [風 ;電動與太陽能車;沼氣]

  • [Biofuels; Photosynthetic Algae; Compost] All those ideas have one thing in common.

    [生物燃料;光合藻類 ;堆肥] 所有這些想法都有一個共同點:

  • They all came from people. People innovate.

    它們都來自人,創新的人。

  • People create. It's the limitless potential of creative people

    人們創造它們。恰恰就是 有創意的人以其無限的潛質

  • to build unimagined technologies that is going to stop climate change

    創造了難以想像的科技 以阻止氣候變遷、

  • and rebalance the ecosystem. And that is something to be hopeful about.

    和恢復生態系統的平衡。 這就是我們可以希冀的事。

Carbon dioxide, or CO2, is the main greenhouse gas in climate change.

二氧化碳是導致氣候變化的主要溫室氣體,

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B1 中級 中文 TED-Ed 二氧化碳 植物 循環 科技 溫室

TED-Ed】碳循環--納撒尼爾-曼寧。 (【TED-Ed】The carbon cycle - Nathaniel Manning)

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