Climate change is primarily driven by human activities that increase greenhouse gases in the atmosphere, along with some natural factors. Here are the main reasons:

## Human-Caused Factors (Primary Drivers)

**1. Burning Fossil Fuels**
- Coal, oil, and natural gas combustion for electricity, heat, and transportation
- Releases carbon dioxide (CO2), the main greenhouse gas
- Accounts for about 75% of global greenhouse gas emissions

**2. Deforestation**
- Removes trees that naturally absorb CO2 from the atmosphere
- Often followed by burning, which releases stored carbon
- Reduces Earth's capacity to regulate atmospheric CO2

**3. Industrial Processes**
- Manufacturing and chemical processes release various greenhouse gases
- Cement production alone accounts for about 8% of global CO2 emissions
- Some industries release potent gases like fluorinated gases

**4. Agriculture**
- Livestock farming produces methane through digestion
- Rice paddies release methane in waterlogged conditions
- Fertilizers release nitrous oxide
- Land clearing for farming contributes to deforestation

**5. Transportation**
- Cars, planes, ships, and trains burn fossil fuels
- Growing global transport demand increases emissions
- Accounts for about 16% of global greenhouse gas emissions

## Natural Factors (Secondary)

**1. Volcanic Activity**
- Can temporarily cool climate by releasing particles that reflect sunlight
- Also releases CO2, though far less than human activities

**2. Solar Variations**
- Small changes in sun's energy output
- Current warming cannot be explained by solar activity alone

**3. Ocean Cycles**
- El Niño and La Niña affect short-term climate patterns
- Don't cause long-term warming trends

## The Greenhouse Effect

These activities enhance the natural greenhouse effect by:
- Trapping more heat in Earth's atmosphere
- Preventing heat from escaping to space
- Leading to rising global temperatures

The scientific consensus confirms that current climate change is overwhelmingly due to human activities since the mid-20th century.
