Post-Human World: Environmental Changes

The video explores a hypothetical scenario where humans suddenly disappear. It discusses the immediate and long-term effects on infrastructure, environment, and wildlife. Power plants and drainage systems would fail, leading to flooding and blackouts. Over time, nature would reclaim urban areas, and wildlife would thrive. The Earth's climate would gradually recover, taking thousands of years to return to pre-human levels. The video concludes with facts about human impact on the planet.

What is the first major infrastructure to fail if humans suddenly disappeared?

• Transportation systems

• Power plants and drainage systems

• Communication networks

• Food supply chains

What would be the primary source of light after a human extinction event?

• Moonlight

• Natural sunlight

• Streetlights

• Flames from malfunctioned oil refineries

How long would it take for streets to be overtaken by nature?

• Over 50 years

• Within a year

• About 5 years

• Around 20 years

What natural process will cause cracks in roads and buildings?

• Earthquakes

• Changing climate and water freezing/melting

• Volcanic eruptions

• Animal activity

Which type of plants will thrive in cities post-human extinction?

• Orchids

• Wild and poisonous plants like ivy

• Bamboo

• Cacti

What will happen to village houses over time?

• They will remain intact

• They will be preserved by nature

• They will be converted into museums

• They will decay slowly and eventually collapse

Which insect is likely to survive in a post-human world?

• Urban cockroaches

• Butterflies

• Cockroaches from the dinosaur era

• Bees

How long might it take for carbon dioxide levels to return to pre-human levels?

• 10,000 years

• 25,000 years

• 100,000 years

• 65,000 years

What percentage of the planet's land mass has been transformed for human use?

• 50%

• 90%

• 25%

• 75%

What percentage of mammals are threatened with extinction worldwide?

• 12%

• 20%

• 5%

• 30%