What happens if you cut down all of a city's trees? – Stefan Al

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Explore what makes trees a vital part of cities, and how urban spaces throughout history have embraced the importance of trees.

By 2050, it’s estimated that over 65% of the world will be living in cities. We may think of nature as being unconnected to our urban spaces, but trees have always been an essential part of successful cities. Humanity has been uncovering these arboreal benefits since the creation of our first cities thousands of years ago. So what makes trees so important to a city’s survival? Stefan Al explains.

Lesson by Stefan Al, directed by Mette Ilene Holmriis.

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41 Comments

  1. Learn about some mind-blowing solutions to the Climate Crisis and how you can get involved with #EarthSchool, a 30 day adventure from TED-Ed and UNEP that combines videos, activities, and next steps that will leave you marveling at the natural world and excited about the future. Start the challenge with a friend or family member today: https://bit.ly/Earth-School

  2. I started planting trees at the age of 12 and I'm now 21.. my father and brothers encourage me to plant…. I'm not planting trees for myself but I'm preparing for my future children or grandchildren 💚…. And also I believed that trees ave big impact to mental health coz personally I experienced it.

  3. I’m architecture student I have just finished my first year after I have watched this video i started putting lot’s of trees in every project i do 😂😂 and will continue doing it even after I finish architecture school 🙏

  4. Should mention now the maintenance of large parks is ridiculously expensive and can single handedly drive up rent to unbearable prices. Or how much of the natural habitat you're killing off to make rooms for the wildlife you'd prefer to see.

  5. The aloof laura interestedly instruct because save substantively appear across a wistful surgeon. enormous, mere purple

  6. Tree Check List:
    1. Roots sore and clean water and stableize the earth.
    2. Trees use up C02 and give out oxygen very useful for modern earth climate change.
    3. Trees heal mental health/ stress damn I need 100 forests then ok next point
    4. Trees cool down the air

  7. lmao took me time to realize Anuradhapura was in my country because of the pronunciation, anyways it is true that Anuradhapura was one of the cities with the greatest irrigations systems in the world, as a native if you're coming for a visit I would definitely recommend visiting Anuradhapura since there are lot ancient places to visit.

  8. Portland is absolutely gorgeous, it’s got high buildings as a city, but it also has trees and foliage scattered all around the city, and it’s always really nice there

  9. My neighborhood is constantly cutting down trees, yet somehow there's still a ton. But several times per week I have to suffer all day long listening to the incessant buzzing machinery as they cut and then shred all the wood in the chipper. There's a wealth of practical reasons why trees shouldn't be cut down (I understand sometimes it is necessary) but the noise pollution it causes is driving me mad. Like right now I've been listening to this tree being cut down and shredded for 5 hours. 5 literal hours of loud machinery noise. I can't do any work, can't relax. And this happens several times per week. The neighborhood I live is like uninhabitable because of the constant machinery noise alone. Idk how everyone is constantly cutting trees yet there's still so many.

  10. The only time people do anything about this is when people are dying on mass and are forced to challenge the elites living in dreamworld. Mayors and city councillors are living in denial.

  11. I have lived in a total urbanized city and another where there are plants and birds. The second one is so much peaceful. You literally enjoy life.

  12. I have always been opposed to humanity trying to make an environment to live in that is destructive to the Natural arrangement.
    And I have always believed that the human being is a very young species when it comes to having actual intelligence.

  13. That's the power of Hinduism. "Vruksho rakshathi rakshithaha" is one of the mottos of Hinduism. Other Indegeonous religions like Budhism and Jainism take queues from Hinduism. That's why all these Indic religions are well respected and peaceful.

  14. If people want to plant more trees then they shouldn't support PV solar and wind energy because both sources of energy require huge amounts of land which would either deforestation or use space which could otherwise be taken up by trees instead. If we want reforestation and afforestation we should support nuclear energy and non-intermittent renewables, not PV solar and Wind, biofuels can be grown in ways that do not require using huge amounts of land, such as sea kelp biofuel or biofuel made from cover crops so, therefore, I did not consider them a land-use problem, PV solar and wind, on the other hand, cannot be done in ways that do not require huge amounts of space.

    In the future, we need Nuclear energy and Non-intermittent renewables like Tidal, geothermal, and advanced biofuels. That way we can have space for trees.

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