跟读练习: What if there were 1 trillion more trees? - Jean-François Bastin - 通过YouTube学习英语口语
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Standing at almost 84 meters tall, this is the largest known living tree on the planet.
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Standing at almost 84 meters tall, this is the largest known living tree on the planet.
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Nicknamed General Sherman, this giant sequoia has sequestered roughly 1,400 tons of atmospheric carbon over its estimated 2,500 years on earth.
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Very few trees can compete with this carbon impact, but today, humanity produces more than 1,400 tons of carbon every minute.
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To combat climate change, we need to steeply reduce fossil fuel emissions, and draw down excess CO2 to restore our atmosphere’s balance of greenhouse gases.
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But what can trees do to help in this fight?
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And how do they sequester carbon in the first place?
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Like all plants, trees consume atmospheric carbon through a chemical reaction called photosynthesis.
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This process uses energy from sunlight to convert water and carbon dioxide into oxygen and energy-storing carbohydrates.
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Plants then consume these carbohydrates in a reverse process called respiration, converting them to energy and releasing carbon back into the atmosphere.
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In trees, however, a large portion of that carbon isn’t released, and instead, is stored as newly formed wood tissue.
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During their lifetimes, trees act as carbon vaults, and they continue to draw down carbon for as long as they grow.
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However, when a tree dies and decays, some of its carbon will be released back into the air.
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A significant amount of CO2 is stored in the soil, where it can remain for thousands of years.
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But eventually, that carbon also seeps back into the atmosphere.
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So if trees are going to help fight a long-term problem like climate change, they need to survive to sequester their carbon for the longest period possible, while also reproducing quickly.
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Is there one type of tree we could plant that meets these criteria?
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Some fast growing, long-lived, super sequestering species we could scatter worldwide?
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Not that we know of.
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But even if such a tree existed, it wouldn’t be a good long-term solution.
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Forests are complex networks of living organisms, and there’s no one species that can thrive in every ecosystem.
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The most sustainable trees to plant are always native ones; species that already play a role in their local environment.
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Preliminary research shows that ecosystems with a naturally occurring diversity of trees have less competition for resources and better resist climate change.
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This means we can’t just plant trees to draw down carbon; we need to restore depleted ecosystems.
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There are numerous regions that have been clear cut or developed that are ripe for restoring.
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In 2019, a study led by Zurich’s Crowtherlab analyzed satellite imagery of the world’s existing tree cover.
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By combining it with climate and soil data and excluding areas necessary for human use, they determined Earth could support nearly one billion hectares of additional forest.
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That’s roughly 1.2 trillion trees.
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This staggering number surprised the scientific community, prompting additional research.
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Scientists now cite a more conservative but still remarkable figure.
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By their revised estimates, these restored ecosystems could capture anywhere from 100 to 200 billion tons of carbon, accounting for over one-sixth of humanity’s carbon emissions.
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More than half of the potential forest canopy for new restoration efforts can be found in just six countries.
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And the study can also provide insight into existing restoration projects, like The Bonn Challenge, which aims to restore 350 million hectares of forest by 2030.
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But this is where it gets complicated.
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Ecosystems are incredibly complex, and it’s unclear whether they’re best restored by human intervention.
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It’s possible the right thing to do for certain areas is to simply leave them alone.
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Additionally, some researchers worry that restoring forests on this scale may have unintended consequences, like producing natural bio-chemicals at a pace that could actually accelerate climate change.
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And even if we succeed in restoring these areas, future generations would need to protect them from the natural and economic forces that previously depleted them.
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Taken together, these challenges have damaged confidence in restoration projects worldwide.
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And the complexity of rebuilding ecosystems demonstrates how important it is to protect our existing forests.
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But hopefully, restoring some of these depleted regions will give us the data and conviction necessary to combat climate change on a larger scale.
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If we get it right, maybe these modern trees will have time to grow into carbon carrying titans.
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关于本课
在本课中，学习者将通过观看一本关于树木和气候变化的引人深思的视频，提升他们的英语口语能力。通过模仿视频中的发音和语调，学习者可以更好地掌握语音语调，从而在雅思口语练习中表现更佳。此外，课程内容引导学习者思考树木如何通过光合作用吸收二氧化碳，以及应对气候变化的重要性，帮助他们用英语表达复杂的环保主题。
关键词汇与短语
- 光合作用 (photosynthesis): 树木如何利用阳光和二氧化碳产生氧气。
- 温室气体 (greenhouse gases): 影响气候变化的气体，包括二氧化碳。
- 碳存储 (carbon sequestration): 树木如何储存二氧化碳以减轻气候变化。
- 生态系统 (ecosystem): 生物与环境之间的相互作用。
- 原生树种 (native species): 固有于特定地区的树木，适合当地生态。
- 恢复 (restore): 修复被破坏的自然环境和生态系统。
- 生长 (grow): 树木生长的过程与环境的关系。
- 可持续 (sustainable): 对环境影响小的生态友好型做法。
练习技巧
为了有效地进行英语影子跟读，建议学习者在观看视频时保持放松的状态。可以将视频的播放速度降低，以便更好地捕捉讲者的发音和语调变化。使用shadowspeak技术，反复模仿讲者的每一句话，不仅关注单词的发音，也要注意其音调和情感色彩。记得不要急于求成，适当的停顿和重复是提升口语流利度的关键。为了获得更深入的理解，可以在影子跟读后立即总结视频中的重点，这不仅能帮助改善语言表达能力，还能加强对内容的记忆，确保您在雅思口语练习时能够自信表达。在跟读过程中，也可以讨论视频的主题如气候变化和树木的重要性，进一步提高英语表达的复杂度与流利度。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。