科普專欄–薯不揀單 - 三十秒科學–種樹是否一定能夠減低大氣二氧化碳含量？

人為活動產生不少溫室氣體，助長了全球氣候極端化的發生。不少國家亦開始提倡碳中和及減碳排放方案，務求可為下一代提供良好的環境生長。501Please respect copyright.ＰＥＮＡＮＡkW9yMC0MgH
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除減少排放外，如何消除大氣的溫室氣體亦是一個重要課題;501Please respect copyright.ＰＥＮＡＮＡlfpKCuslTA
現今相信約有30%人為活動所排放的二氧化碳將經由陸地的生態環境從大氣中移除開去。501Please respect copyright.ＰＥＮＡＮＡTtCeWyzOTo
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(圖2)植物的光合作用，能夠將大氣的二氧化碳轉化成為植物內部的碳水化合物。501Please respect copyright.ＰＥＮＡＮＡXKI4Oq4Fhu
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換句話說，植物能夠減低大氣間的二氧化碳，皆因它們能夠將二氧化碳氣體的碳原子轉換成為固體的碳原子狀態，把它們收藏在自身身體。501Please respect copyright.ＰＥＮＡＮＡIAc7B3AhqN
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那麼，是否只要瘋狂種樹，就能夠減低大氣的二氧化碳濃度，順利解決二氧化碳方面的問題呢?501Please respect copyright.ＰＥＮＡＮＡefpV8g3ZcT
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(圖3)最近有研究發現，草叢移除大氣二氧化碳的能力有可能會較大樹的為好。501Please respect copyright.ＰＥＮＡＮＡGXc5ThjigA
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雖然大樹本身能夠儲存碳水化合物的能力比草叢的為高，但為了持續供應大樹生長的所需，其根部會聯合各種細菌或生物來獲取泥土的營養，這過程中將會將泥土的碳原子以二氧化碳氣體釋放出去。501Please respect copyright.ＰＥＮＡＮＡOZv6589OiK
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在部份實驗例子中，大樹不但沒能有效移除大氣二氧化碳，倒反而是增長了大氣二氧化碳含量。501Please respect copyright.ＰＥＮＡＮＡJZjKLnr8X1
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如何平衡草叢及大樹種植的比例來獲取減滅二氧化碳的最大收益，將是重要的環保課題。501Please respect copyright.ＰＥＮＡＮＡRHNrlPrVPQ
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。501Please respect copyright.ＰＥＮＡＮＡFYDxFfAk2m
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。501Please respect copyright.ＰＥＮＡＮＡa4NREhDb16
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https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio501Please respect copyright.ＰＥＮＡＮＡViL8t6y1g8
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。501Please respect copyright.ＰＥＮＡＮＡfjsKQ94XeC
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Ref1:https://www.nature.com/articles/s41586-021-03306-8501Please respect copyright.ＰＥＮＡＮＡqo0UqoOHjm

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