Impact of Human-Made Structures on Earth's Biomass

The video discusses how human-made materials now outweigh all living things on Earth. Buildings and infrastructure weigh 11,000 gigatons, while trees and shrubs weigh 9,000 gigatons. Humans have created 9 gigatons of plastic, compared to only 4 gigatons of animals. The weight of living things remains stable, but human-made materials double each year, making the built environment heavier than all biomass, including humans.

What is the weight of human-made buildings and infrastructure compared to trees and shrubs?

• 11,000 gigatons vs. 9,000 gigatons

• 10,000 gigatons vs. 8,000 gigatons

• 8,000 gigatons vs. 10,000 gigatons

• 9,000 gigatons vs. 11,000 gigatons

How does the weight of plastic created by humans compare to the weight of animals on Earth?

• 5 gigatons of plastic vs. 5 gigatons of animals

• 6 gigatons of plastic vs. 3 gigatons of animals

• 9 gigatons of plastic vs. 4 gigatons of animals

• 4 gigatons of plastic vs. 9 gigatons of animals

What remains mostly constant year to year on Earth?

• The weight of buildings

• The weight of human-made structures

• The weight of living things

• The weight of plastic

What is happening to the amount of human-made materials each year?

• It is halving

• It is decreasing

• It remains the same

• It is doubling

What now weighs more than all biomass on Earth, including humans?

• Natural resources

• Human-made environment

• Animal population

• Oceanic mass