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how to improve the conditions of life of all citizens of the world without exhausting the Earth definitely? How to satisfy the needs of the men with today as bequeathing the Earth in good state to the generations who will live it after us?

While learning to save and to share equitable manner resources, while using the technologies that pollute less, that waste less water and less energy, and especially while changing our habits by actions better reflexive and oriented future. It is it, the lasting development. It is not behind a return, but a progress for the humanity: the one to consume without polluting and without dwindle.