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waste water from sinks, washing machines, dishwashers, showers and baths, which can be used for flushing toilets or watering the garden.
graphical representation of various aspects of food chains.
to change the structure of a protein so that it can no longer carry out its function.
process by which cells become specialised to perform a specific function.
chlorofluorocarbons (CFCs) are organic compounds that contain carbon, chlorine and fluorine.