Try these Quizzes.
Hover over the question mark to see the answer.
What causes climate change?
(e) All of the above! The first 3 phenomena have cyclical actions of tens of thousands of years. This is why we have periodic ice ages. (See, Milankovitch cycles). There’s not much we can do about these.
Accumulation of greenhouse gases due to human actions is a recent phenomena and is likely to cause serious climate disruption in only a few decades. Fixing this one is up to us!
So if you answered (d), you were not wrong.
Fossil fuels ...
Answer: (b), (c) and (d).
If conventional oil extraction is at or near its peak, coal and natural gas reserves are plentiful. But the supply of all fossil fuels is limited. They are not renewable on human time scales.
We want our energy to be safe. Which of these energy sources causes the least fatalities per TWh generated?
Looks like it's nuclear!
Global warming warning
- The global warming process is speeding up, and the growing concentration of greenhouse gases is causing global temperatures to rise to an ever more dangerous level.
- The extinction of wildlife has led to an emergency situation that threatens our very civilisation.
- Air pollution and contaminated water kill more people every year than all wars and acts of violence put together.
- The existing model is unsustainable. It continually generates crises, social inequality and a growing danger of environmental disaster.
- We still have a decade in which to make a change.
Who made these statements?
Answer (c) is correct.
The citations are from "What is at stake now" (2019) by Mikhail S. Gorbachev (1931-2022, last President of the Soviet Union.