陽光、二氧化碳及水份充足情況下，光合作用在樹葉裡頭發生，二氧化碳的碳原子將儲存在樹木裡，並釋出氧氣。488Please respect copyright.ＰＥＮＡＮＡEMBKMJ9hkU
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秋天時份，溫度驟降，樹木意識到冬天即將來臨，便啟動落葉機制，以免冬天低溫為樹葉帶來傷害。488Please respect copyright.ＰＥＮＡＮＡ8xFkDi7eLW
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（圖2）根據這個理念，全球氣侯所導致的溫度提升，將會使綠葉時間延長1-3星期。488Please respect copyright.ＰＥＮＡＮＡk51szpGmux
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但出乎意外的是，實驗及現實證據指出，綠葉時間反而是平均縮短了3-6日（Ref1)。488Please respect copyright.ＰＥＮＡＮＡhfsVwthevE
488Please respect copyright.ＰＥＮＡＮＡjoRFgOkHBe
（圖3）分析由1948-2015年達434,226項的樹木數據再加上各種實驗，科學家得出以下的解釋。488Please respect copyright.ＰＥＮＡＮＡHcNGAJVhUJ
488Please respect copyright.ＰＥＮＡＮＡgLuTqnNQgu
488Please respect copyright.ＰＥＮＡＮＡ9bClMXX6JW
全球變暖再加上大氣二氧化碳含量上升，樹木的光合代謝率亦因而有所提升。488Please respect copyright.ＰＥＮＡＮＡFGya0U5wV5
488Please respect copyright.ＰＥＮＡＮＡehQ30lu3Ni
光合代謝的過程中，二氧化碳的碳原子會以固體方式儲存在榭木內。488Please respect copyright.ＰＥＮＡＮＡIQbHjN8yCU
如果固體碳原子到達一定的程度，就算溫度和暖，亦會觸發樹葉變黃及落葉發生。488Please respect copyright.ＰＥＮＡＮＡyOJjiy80tc
488Please respect copyright.ＰＥＮＡＮＡKy4AMxfH5B
（圖4）圖中展示出兩種導致落葉情況發生的可能性。488Please respect copyright.ＰＥＮＡＮＡz1pjKXAQup
488Please respect copyright.ＰＥＮＡＮＡ9tbtI7BFdO
488Please respect copyright.ＰＥＮＡＮＡmnLuwwYjcr
這表示出每一棵樹木均有其轉化二氧化碳至氧氣的限額，並不能夠無窮無盡地吸收二氧化碳。488Please respect copyright.ＰＥＮＡＮＡeXu71aN2oh
單純依靠種植樹木意圖來改善全球的氣候變化，實際上亦有一定的限制。488Please respect copyright.ＰＥＮＡＮＡPkFZRUlj8a
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。488Please respect copyright.ＰＥＮＡＮＡ4YMPQtqW0k
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https://www.instagram.com/potatopigtongue/488Please respect copyright.ＰＥＮＡＮＡXioy6PPalu
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Ref1:https://science.sciencemag.org/content/370/6520/1066?intcmp=trendmd-sci488Please respect copyright.ＰＥＮＡＮＡRhfSUg95bZ
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