Answer:
Wetlands are places which contain more moisture content than the arid or dry land. It is believed that the wet region have less strength . As we all know anything which is in contact with water have lesser strength due to water molecules harm the chemical bonding in the object.
Ancient times house construction was done using natural rocks and stones and which reacted using physical bond hence the ancient people were successful as it used physical reaction and hence its strength was not affected by the moister. Present day homes are built using chemical bonds which told two layers adhere hence moisture affect its strength and binding.
<span>The
causes of environmental problems in Sub-Saharan Africa are deforestation,
development, and increased population. As the country is aiming for development,
its environmental status is impaired. Increasing population resulted to
migration to higher urban or rural areas, and continuous land cultivation which
eventually caused deforestation and dilapidation.</span>
An acute angle is less than 90 degree ;)
We should grow many trees.If we don't the world will warm in the next 20-80 years.
