What Earth in 2125 could look like - Iseult Gillespie

15,981 views ・ 2025-04-15

TED-Ed


Please double-click on the English subtitles below to play the video.

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Faced with the realities of current crises,
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it's easy to assume our world is headed in a bleak direction.
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But there’s good reason to be hopeful—
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with developments in science and technology,
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a positive future is more viable than ever before.
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So, what if the future was awesome?
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Let’s explore what the future of three cities could look like,
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if we harness the tools we already have at our disposal
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to solve today's problems.
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These visions are inspired by solarpunk,
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an art and social movement that imagines sustainable worlds
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in which humans, nature, and technology exist in harmony.
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It’s 2125.
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In the past, Los Angeles was running out of water
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and its citizens were dependent on 5 million cars.
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Today, people glide down highway 101 on electric bikes, buses, and trains.
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There’s no fee for these services—
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instead, folks contribute their technical or gardening skills,
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or provide entertainment for others as they go.
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Year-round sunlight makes LA well-suited to solar infrastructure,
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but water is still limited.
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City dwellers manage this by maintaining water-efficient farms in high rises,
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and within the 17 million square meters of land that once housed parking spaces.
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Here, students and scientists mist local fruit, vegetables, and grains
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with nutrients.
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They also create portable farms, stacking layers of plant and fertilizer
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into temperature-controlled shipping containers
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that can be transported out to city residents and beyond.
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In Lagos, Nigeria, the city’s coast is completely transformed.
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In the past, sand mining and urban expansion
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eroded roughly 84% of the shoreline,
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which put the city at risk of catastrophic flooding.
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But the city responded by restoring the wetlands,
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which now act as natural sponges.
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An intricate array of pipes, equipped with turbines,
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capture the energy of flowing water and convert it into electricity.
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This powers buildings and services all over Lagos,
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like the city’s famous Balogun market,
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where people come together to trade, socialize, and entertain.
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Along the coast, people steward thousands of native mangrove plants,
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which act as carbon sinks,
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clean up the pollutants of the past, and support biodiversity.
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This area celebrates the mangrove in many forms—
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local designers use its tannins to dye fabrics,
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while scientists research its pharmaceutical potential
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and its uses as a natural pesticide.
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Further out to sea, people embrace sustainable fishing practices
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and repurpose fish processing waste
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to power ships, floating farms, and public housing.
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Meanwhile, São Paulo, Brazil has fully reimagined housing.
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In its industrial past, the city battled heavy pollution,
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and up to a third of the population lived in unsanitary conditions.
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But today, homes, schools, local government buildings,
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and entertainment spaces are made from repurposed materials
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from the former auto industry.
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These buildings generate their own solar power and capture rainwater to reuse.
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At the center sits a new solar football stadium,
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which generates energy and doubles as an incubator
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for growing native plants.
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In areas where the land remains toxic,
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citizen scientists are stewarding thousands of mushrooms.
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These mushrooms break down the bonds in the decades-old chemicals
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which remain in soil long after the burning
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of oil, gas, and household garbage.
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They then produce new spores,
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attracting insects and birds to the area once again.
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These versions of LA, Lagos, and São Paulo embody the principle of life
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enmeshed with the promises and limitations of its surroundings.
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And while this future may seem far from reach,
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it is achievable, and it might not even take us 100 years to get there.
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All over the world, communities are embracing these and similar ideas
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to build more sustainable systems.
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In Vancouver, Indigenous First Nations are building affordable, net-zero
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housing projects incorporating green spaces and bike infrastructure.
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In Singapore, urban farms flourish on skyscrapers
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and in the shells of former prisons.
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In Prague, urban beekeeping takes flight in hotels and theaters.
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Optimism can be a powerful mobilizing force.
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From natural technologies to renewable energy,
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we have so many transformative tools at our disposal.
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All we need is the will to implement them.
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