Modern, human-caused climate change is escalating the threats that make sea walls necessary. Sea levels are rising, putting communities at greater risk from floods. Storms are intensifying, causing more and more sand to erode from beaches.
Answer:
The Amazon Rainforest
Explanation:
porous
rocks that has holes and holds water are called porous
because there might be changes in the future which could make the estimates unreliable for example war or decline in economy
