Official approaches to squatter settlements and the housing of the urban poor have changed over time from policies of clearance and relocation to schemes which promote the involvement of the private sector and nongovernmental organizations in supporting poor residents to improve their own housing and neighborhoods.n this article, the main debates surrounding squatter settlements are outlined, focusing on definitional issues and their geographical distribution. The changing nature of policies toward these settlements is also covered.
Lichen. Lichen is a structure that commonly grows on trees; it is a result of a symbiotic relationship between algae and fungi. The fungus provides a structure that collects water and nutrients that the algae takes advantage of; the algae in turn uses its chlorophyll to produce food for both itself and the fungus.Species of the Trentepohlia genus are commonly found in lichens.he fungus provides a structure that collects water and nutrients that the algae takes advantage of; the algae in turn uses its chlorophyll to produce food for both itself and the fungus. Species of the Trentepohlia genus are commonly found in lichens.
Einar Tindal. Common Greenshield is one of our most common lichens. A lichen is special, because it is not one organism, but two. A lichen is a complicated relationship between a fungus and an algae.A lichen is created when the fungus and algae join together to form a new organism.The lichen looks different than the way the fungus or algae looks by itself.The lichen can also reproduce itself and looks like a plant.inar Tindal. Common Greenshield is one of our most common lichens. A lichen is special, because it is not one organism, but two. A lichen is a complicated relationship between a fungus and an algae.