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| Topic: Air Pollution | |
| Description: Air pollution is the contamination in Earth's atmosphere from pollutant substances. | |
| Topic: Air pollution | |
| Description: The air quality in Los Angeles has moderate air quality with an index of 58. | |
| Topic: Water pollution | |
| Description: Water pollution is harmful substances or pollutants contaminating water that includes lakes, oceans, rivers and etc | |
| Topic: Illegal dumping | |
| Description: Illegal dumping is the act of disposing waste in unauthorized areas that includes sidewalks, parking lots, vacant areas and etc. | |