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sustainable city

Across
Examples are fossil fuels, oil, coal and natural gas
Is the process of converting waste materials into new materials and objects.
Examples are Solar, wind, wood and hydroelctricity
A natural resource that can be replaced at the same rate at which the resource is consumed
It is capable of being decomposed by bacteria or other living organisms
A decline to a lower condition, quality, or level
Down
Energy that does not pollute the environment
It meets the needs of the present without compromising the ability of future generations to meet their own needs
It cannot be changed to a harmless natural state by the action of bacteria
It is capable of being decomposed by bacteria or other living organisms
To maintain the health of the natural world