Question

まっちゃ

英検2級のライティングの添削をお願いします🙏
内容、構成、語彙、文法が各4点で16点満点です。
写真は解答にのってたものです。
(TOPIC)
Today, many buildings collect rainwater and then use it in various ways, such as giving water to plants. Do you think such buildings will become more common in the future?
(POINTS)
○Cost
○Emergency
○Technology

I think many buildings will collect rainwater in the future.I have two reasons why I think so.
To begin with, collecting rainwater makes buildings little cost to use water.Buildings can spend more money instead of water cost.
In addition, collected rainwater may help us when a disaster happen. For example, collected rainwater can boil food and be used for taking a bath.
For these reasons, I think It will become more common that buildings collect rainwater in the future.

4
I think such buildings will become more common in the future. First,
by making use of rainwater, a building owner can reduce the cost
of water used from the water supply. For example, rainwater can
be used for washing cars and for growing plants in gardens.
Second, collecting rainwater can be useful in times of disaster.
Due to damage to water pipes, supplies of water are sometimes
limited. In such cases, rainwater will help until normal conditions
return. Therefore, I think buildings that collect rainwater will
become more common in the future.
(*上記はあくまでも解答例です。)