Rainwater harvesting is necessary because there is less and less drinking water on earth and it is becoming more and more valuable. The need for water is the basic life requirement of every person, and where it is not available in sufficient quantities, it can create big problems. The average water consumption per person per day is between 100-200 liters. Half is used for toilets, laundry, car washing, watering plants. Accumulation of water in reservoirs (from the roofs of houses, cottages, residential buildings) would bring significant savings and solve the problem where it is not enough.
Since rainwater is obtained by collecting rain in plastic tanks, it cannot completely replace drinking water from the water supply. When they fall, raindrops pick up dirt from the atmosphere, so rainwater is not good for drinking and preparing food. But, depending on how the rainwater is collected, that water can be very usefully used.
Rainwater, unlike ordinary water, has no mineral ingredients and is therefore ideal for watering plants, washing cars and other machines, clothes and other laundry in washing machines, rinsing toilets and showering. It is also ideal for washing hair because there are no ingredients that negatively affect the hair. At a time when prices are going wild and wages are stagnating, it is necessary to peek into the rich treasury of nature and use all its benefits. One of them is certainly rainwater - free water that needs to be collected in plastic water tanks.