Answer:
1. Water pollution occurs when harmful substances contaminate a stream, river, lake, ocean, or other body of water, lessening water quality and rendering it toxic to humans or other animals.
2. Water shortages are also known as water crisis apart from the lack of resources, there is difficulty in obtaining access to freshwater Due to the lack of access to water.
3.---
4. two major causes of global sea level rise are thermal expansion caused by warming of the ocean and increased melting of land-based ice.
Explanation:
<3
