Why should the pools of the future be made with glass pannels?

Thanks to glass panels, our pool will warm up more quickly and we will be able to swim longer in our pool. Maybe we can swim even in the winter months because our pool is hot thanks to the natural solar energy. We will not need to spend money to heat our swimming pool. In other words, the pools of the future should be made by using glass pannels so we do not have to spend electricity to heat our pools.  In other words, thanks to glass panels, we will benefit from natural solar energy. So we have an environmentally friendly pool.