TED-Ed: What happens if you cut down all of a city's trees? | Stefan Al

The video explores the role of trees in urban environments, comparing ancient cities like Uruk and Anuradhapura, where trees influenced their development and sustainability. It highlights the ecological and health benefits of trees, such as air purification and mental well-being. Historical and modern examples, including Manhattan and Hong Kong, illustrate the impact of urban planning on tree integration. The video also discusses cities like Savannah, Copenhagen, and Singapore, showcasing their commitment to urban greenery and biodiversity. It emphasizes the importance of trees in creating sustainable and resilient urban spaces.

How did the city of Anuradhapura differ from Uruk in its approach to tree management?

• Anuradhapura considered trees sacred and planted more.

• Anuradhapura ignored trees completely.

• Anuradhapura cut down trees for agriculture.

• Anuradhapura used trees only for construction.

What role do trees play in managing urban water systems?

• They increase the need for water treatment plants.

• They act as natural sponges, absorbing stormwater.

• They have no impact on water systems.

• They prevent water from reaching the soil.

In what way do trees contribute to air quality in cities?

• They release carbon into the atmosphere.

• They trap pollutants and purify the air.

• They block sunlight, reducing air quality.

• They have no effect on air quality.

How did the lack of trees affect Manhattan in the 1870s?

• It increased solar radiation absorption by buildings.

• It made the city cooler during summer.

• It had no effect on the city's climate.

• It improved sanitation standards.

What is one mental health benefit of having trees in urban areas?

• They decrease attention spans.

• They increase stress levels.

• They have no impact on mental health.

• They improve recovery rates in hospitals.

Which city is known for its commitment to urban forestry with over 1.2 million trees planted?

• Portland

• Singapore

• Copenhagen

• New York

What is a key feature of Singapore's urban forestry efforts?

• Vertical gardens called supertrees.

• Complete deforestation for urban development.

• No integration of trees in urban planning.

• Exclusive use of artificial plants.