(1) Our needs, without depriving someone else's
The persistent and non-biodegradable substances such as pesticides, pharmaceutical compounds, biocides, etc. are found more and more in the lakes. A balance between consumption and removal is part of sustainable development.
(Canon EOS 450d, EF 70-200mm f/2.8L IS, 70mm, f/11, 1/200, iso100, Exp -1)
(2) Water: A durably good and sufficient inheritance
Will we be able to leave behind for our children water of same quality and quantity as the one, left by our parents?
(EOS 450d, EF-S 18-55mm f/3.5-5.6 IS, 55mm, f/5.6, 1/200, iso100)
(3) Use but not waste
In the world, an every five person doesn't have drinking water, especially in rural area.
(Canon EOS 450d, EF-S 18-55mm f/3.5-5.6 IS, 55mm, f/5.6, 1/200, iso200, flash)