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。568Please respect copyright.ＰＥＮＡＮＡglXiwLpZU3
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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;568Please respect copyright.ＰＥＮＡＮＡyrorbwPhft
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。568Please respect copyright.ＰＥＮＡＮＡw9lcpiYHxp
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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。568Please respect copyright.ＰＥＮＡＮＡNUTUTLDP7O
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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。568Please respect copyright.ＰＥＮＡＮＡkuGHU7ZPOy
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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?568Please respect copyright.ＰＥＮＡＮＡXhh0UWn2w2
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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。568Please respect copyright.ＰＥＮＡＮＡiONnuEoLAY
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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。568Please respect copyright.ＰＥＮＡＮＡF20GvDYewu
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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。568Please respect copyright.ＰＥＮＡＮＡwng6lbid0J
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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。568Please respect copyright.ＰＥＮＡＮＡU6rxZdFHL8
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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。568Please respect copyright.ＰＥＮＡＮＡQC9SY3rIhV
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc568Please respect copyright.ＰＥＮＡＮＡ7X3GNGSMST
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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。568Please respect copyright.ＰＥＮＡＮＡfCGjjNYBrG
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Link:568Please respect copyright.ＰＥＮＡＮＡlRdiRe6OLW
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio568Please respect copyright.ＰＥＮＡＮＡ7uO38z1ok4
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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。568Please respect copyright.ＰＥＮＡＮＡwJcPYkMg8h
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Ref1:https://www.nature.com/articles/s41586-021-03306-8568Please respect copyright.ＰＥＮＡＮＡ2rgZiOXyFM

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