Question 1

What is the greenhouse effect?

Accepted Answer

The greenhouse effect is a natural process where certain gases in Earth's atmosphere (like CO₂, methane, and water vapor) trap heat from the sun, keeping the planet warm enough to support life. Without it, Earth's average temperature would be about -18°C (0°F). Human activities have intensified this effect by adding more greenhouse gases.

Question 2

What is the main cause of current climate change?

Accepted Answer

The burning of fossil fuels (coal, oil, and natural gas) is the primary cause of current climate change. These activities release carbon dioxide and other greenhouse gases into the atmosphere, enhancing the natural greenhouse effect and causing global temperatures to rise.

Question 3

How much has Earth's temperature risen since pre-industrial times?

Accepted Answer

Earth's average surface temperature has risen approximately 1.1-1.2°C (about 2°F) since the pre-industrial era (roughly 1850-1900). The Paris Agreement aims to limit warming to well below 2°C, preferably 1.5°C.

About the Climate Change Science Quiz