Nanomaterials describe, in principle, materials of which a single unit is sized (in at least one dimension) between 1 to 1000 nanometres (10−9 meter) but usually is 1 to 100 nm (the usual definition of nanoscale).
Climate change is expected to have a significant impact on the availability and quality of water and increase the likelihood of flooding. A European initiative is creating a citizen observatory for water that will allow the public to take part in the management of water resources.
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