1. Air pollution: caused by emissions from vehicles, industrial processes, and burning of fossil fuels. Solutions include transitioning to renewable energy sources, improving public transportation, and implementing stricter emissions regulations.

2. Water pollution: caused by industrial runoff, agricultural chemicals, and improper waste disposal. Solutions include implementing better waste management practices, reducing the use of harmful chemicals, and investing in water treatment facilities.

3. Plastic pollution: caused by the improper disposal of single-use plastics. Solutions include reducing plastic consumption, promoting recycling and composting, and implementing bans on single-use plastics.

4. Deforestation: caused by logging, agriculture, and urban development. Solutions include promoting sustainable forestry practices, protecting endangered habitats, and reforestation efforts.

5. Climate change: caused by the burning of fossil fuels and deforestation. Solutions include reducing carbon emissions, investing in renewable energy sources, and promoting sustainable land use practices.

6. Noise pollution: caused by traffic, industrial activities, and construction. Solutions include implementing noise barriers, reducing vehicle emissions, and enforcing noise regulations.

7. Light pollution: caused by excessive artificial lighting. Solutions include using energy-efficient lighting, implementing light pollution ordinances, and promoting dark sky initiatives.