Description:
The correct answer is:
✅ Carbon dioxide (CO₂)
Why?
CO₂ is a primary greenhouse gas that traps heat in Earth’s atmosphere, driving global warming.
Human activities (burning fossil fuels, deforestation) have increased CO₂ levels by ~50% since the Industrial Revolution.
Other Greenhouse Gases (Not Listed):
Methane (CH₄), Nitrous Oxide (N₂O), Water Vapor (H₂O).
Why Not Oxygen or Nitrogen?
Oxygen (O₂) and Nitrogen (N₂) make up ~99% of the atmosphere but do not trap heat like CO₂.
Impact: Rising CO₂ levels intensify the greenhouse effect, causing climate change. 🌍🔥
Fun Fact: Venus’s thick CO₂ atmosphere makes it the hottest planet—a warning for Earth!