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This american site contains fun and useful information on Backyard Conservation:
What Is Conservation?
Conservation means using Earth’s natural resources in a way that is not wasteful and making sure that human beings can get what they need without destroying the habitats of plants and animals. One example of conservation is using renewable resources that cannot be used up, like wind and solar power, instead of non-renewable resources like oil or coal.
The number one resource
for sustainability in post-16 education