Consumer products giant Unilever has announced plans to source all of the carbon-based materials in its cleaning and laundry products from renewable or recycled sources, thus throwing down the gauntlet to chemical suppliers.  According to Unilever, this will cut the carbon footprint of its product formulations by up to 20%, since the chemicals it uses in cleaning and account for 46% – of that footprint. The company’s most famous brands include Persil, Omo, Domestos, Cif and Sunlight.