“robust knowledge requires both consensus and disagreement.” discuss this claim with reference to the area of knowledge of history.

It does. Knowledge becomes robust when it suffers criticism and yet still prevails. A consensus is made and then it is criticized. This leads to a new consensus and new criticism. Knowledge remains and requires both to become robust because it wouldn't be so without both sides.

Inadvertent and deliberate discharge of petroleum, improper sewage disposal, and thermal pollution also are seriously affecting the quality of the hydrosphere. The present discussion focuses on three major problem eutrophication acid rain and the buildup of the so called greenhouse gases.

Explanation: