The video explores the concept of geo-engineering as a response to rising global temperatures, tracing its origins to Cold War-era research on nuclear winter. It discusses the nuclear arms race between the US and the Soviet Union, the public movement for nuclear freeze, and the scientific findings on nuclear winter's potential effects. Over time, these effects were reevaluated, leading to a more nuanced understanding. The video also examines the idea of using geo-engineering to combat global warming, while highlighting the ongoing nuclear threats and the importance of awareness.

What is geo-engineering primarily proposed for?

• To increase global temperatures

• To artificially cool the Earth

• To enhance agricultural production

• To promote nuclear energy

What was the primary concern during the Cold War that led to the concept of nuclear winter?

• Global warming

• Nuclear war between superpowers

• Space exploration

• Economic collapse

What was the goal of the nuclear freeze movement?

• To develop new nuclear technologies

• To increase nuclear weapons

• To stop the nuclear arms race

• To promote nuclear energy

Who was a prominent figure in raising awareness about nuclear winter?

• Isaac Newton

• Albert Einstein

• Stephen Hawking

• Carl Sagan

What analogy did Carl Sagan use to describe the nuclear arms race?

• A scientific experiment

• A peaceful negotiation

• A room filled with gasoline and matches

• A race to the moon

What did some scientists later suggest about the effects of nuclear winter?

• It would be more severe than initially thought

• It would only affect the superpowers involved

• It would be less severe, akin to a 'nuclear fall'

• It would have no impact on the climate

What was the initial scientific consensus on the impact of nuclear winter?

• It would only affect the military

• It could lead to the extinction of the human species

• It would be a minor inconvenience

• It would have no impact

What is one of the proposed benefits of geo-engineering?

• Promoting fossil fuel usage

• Enhancing nuclear capabilities

• Reducing global warming impacts

• Increasing sea levels

What is a major concern regarding geo-engineering?

• It is universally accepted

• It will increase global temperatures

• It may have unpredictable side effects

• It is too cheap to implement

What is the current status of the nuclear threat according to the transcript?

• It has been completely eliminated

• It is more complex than before

• It is no longer a concern

• It is only a regional issue