Deduction for businesses engaged in collecting and processing of bio-de­ gradable waste.

    If the gross total income of an assessee includes any profits and gains derived from the business of collecting and processing or treating of bio-degradable waste for,—
    (a) generating power; or
    (b) producing bio-fertilizers, bio-pesticides or other biological agents; or
    (c) producing bio-gas; or
    (d) making pellets or briquettes for fuel or organic manure, there shall be allowed a deduction equal to the whole amount of such profits and gains for five consecutive tax years, beginning with the tax year in which such business commences.