The idea of covering lakes with water lily flower

In summer, especially in arid times, some countries cover the lakes with plastic balls in order not to evaporate in the water. However, instead of covering the lakes with plastic materials, it is more accurate and healthier to cover them with lotus flowers. Thus, the waters in these lakes become cleaner and healthier. We can do this by building artificial islands in the deep part of the lake, because this flower knows about 3 meters in space.
The benefits of water lily flower are not counted. He had a lot of properties, including an anti-oxidant and a soothing nerve.