28. Light pollution makes us unable to see the stars in the sky.

29. Glass panels, windows, lawns and roofs make light pollution worse because they reflect both artificial and sun light.

30. All sounds are not noise because noise is any sound that is unwanted and goes beyond its certain limit, for example, above 80 decibels.

31. More and more noise is created by modern civilization, so it has now become a major environmental pollutant, especially in urban areas. 

32. Contamination in the air causes acid rain which damages oil, vegetation and aquatic life of the region.

33. People suffer from stress and anxiety because of noise pollution