Precipitation
starts out as minute droplets suspended in the air. These increase in size
through various processes to larger drops, which fall to the ground when
they become too heavy to be carried by the air flow. The water supplier of
nature is rain, which is
stored for example by the forest and is emitted again slowly. Without this
buffering of the rain there would be innumerable floods and mudflows.
Rainwater is an important natural resource which can be used simply and economically with rainwater facilities. Facilities which utilize rainwater can be installed in both old and new buildings.
