What results in the increase of carbon dioxide contents of earth.s atmosphere?

Explanation

**Step-by-Step Solution:**

1. **Understanding Carbon Dioxide (CO2) Sources:**
- Carbon dioxide is primarily released into the atmosphere through natural processes and human activities. Natural sources include volcanic eruptions, respiration of living organisms, and decomposition of organic matter. Human activities, particularly the burning of fossil fuels (like coal, oil, and natural gas) for energy and transportation, significantly contribute to CO2 emissions.

2. **Human Activities Contributing to CO2 Increase:**
- The industrial revolution marked a significant increase in the use of fossil fuels. As industries expanded, so did the burning of coal and oil, leading to higher CO2 emissions.
- Deforestation also plays a crucial role. Trees absorb CO2 during photosynthesis, and when they are cut down or burned, the stored carbon is released back into the atmosphere.
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