(2)Notwithstanding anything contained in this Act, no deduction in respect of any expenditure or allowance shall be allowed to the assessee under any provision of this Act in computing his income referred to in clause (a) of sub-section (1).Explanation. - For the purposes of this section, "carbon credit" in respect of one unit shall mean reduction of one tonne of carbon dioxide emissions or emissions of its equivalent gases which is validated by the United Nations Framework on Climate Change and which can be traded in market at its prevailing market price.]