# Main Causes of Climate Change

## Human Activities (Primary Driver)

**Greenhouse Gas Emissions**
- Burning fossil fuels (coal, oil, natural gas) for energy releases CO₂
- Industrial processes and manufacturing
- Agriculture, especially livestock farming (methane)
- Deforestation removes trees that absorb CO₂

**Other Human Impacts**
- Cement production and construction
- Waste decomposition in landfills

## Natural Factors (Minor in Current Change)

- Solar radiation variations
- Volcanic eruptions
- Natural orbital cycles of Earth
- Ocean circulation patterns

## Why Humans Are the Main Cause Now

The scientific consensus is clear: current warming is primarily human-caused because:
- CO₂ levels correlate directly with industrial activity
- The rate of change is much faster than natural cycles
- The isotopic signature of atmospheric carbon matches fossil fuel burning
- Natural factors alone cannot explain observed warming

## The Mechanism

1. Greenhouse gases trap heat in the atmosphere
2. This causes average global temperatures to rise
3. Warming triggers cascading effects (melting ice, changing weather patterns, sea level rise)

**Key Point:** While Earth's climate has changed naturally throughout history, today's rapid warming is driven primarily by human activities since the Industrial Revolution.
