sentences:  Blue-green infrastructure can also be a component of "sustainable drainage systems" or "sustainable urban drainage systems" (SuDS or SUDS) designed to manage water quantity and quality, while providing improvements to biodiversity and amenity.Nature can be used to provide important services for communities by protecting them against flooding or excessive heat, or helping to improve air, soil and water quality.When nature is harnessed by people and used as an infrastructural system it is called “green infrastructure”.