Complex sentence: Examples might include lead-acid batteries or electronic circuit boards where the heavy metals can be recovered and used in new products.Another example is the ash generated by coal-fired power plants; these plants produced two types of these residues: fly and bottom ash.
Split into simpler sentences: Examples might include lead-acid batteries or electronic circuit boards where the heavy metals can be recovered and used in new products. A non-household example is the ash generated by coal-fired power plants; these plants produced two types of waste: fly and bottom ash.