Question 7 — A friend says, "The - Questions at the end of the chapter - Chapter 13 Class 8 - Our Home: Earth, a Unique Life Sustaining Planet

Last updated at June 17, 2026 by

Q 7
Question

A friend says, "The Earth has always had climate changes in the past, so today's global warming is nothing new." How would you respond using what you've learnt in this and other chapters of your science book?

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Answer
Today's warming is much faster and is caused mainly by human actions.

Explanation

  • Earth did have natural climate changes, but they were very slow.
  • Today's warming is fast because we burn fossil fuels.
  • This releases extra carbon locked underground for millions of years.
  • So the Earth cannot absorb it fast enough, and heat builds up.
Human activity makes today's warming faster and dangerous.
← Back to concept: 13.6 What Are the Threats to Life on Earth?
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