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Environmental nanotechnology is holding an immense position in modern days’ science and engineering. These advanced ‘nanomaterials’ are being utilized for diverse range of applications but with the ideology of saving environment. Environmental sector is being tackled with the aim of developing sensors for detecting, monitoring and analysing the toxic contaminants so as to protect and remediate environment. In the presented chapter we have tried to illustrate applications of nanofields, and resulting impacts on the four spheres of the earth. Many efforts are being taken to have a check on the negative impacts of the nanotechnology but still there are many prevailing discrepancies that need to be confronted.