So what are the hazardous substances that this bill will improve the regulation of? Well, hazardous substances are, according to one definition I found, chemicals, mixes of chemicals that can be explosive, flammable, corrosive, have a capacity to oxidise and/or be toxic to people and the environment. They include substances such as petrol, cleaning products, fireworks, solvents, cosmetics, and, one review panel noted, even the ingredients of toothpaste. I found estimates of 200,000 different substances which fit this definition and which are in use in New Zealand. So the safe acquisition, use, and disposal of hazardous substances is important for human health, for nature, and for the economy. There would be some native plants and wildlife which would be potentially extinct without the use of 1080, the aerial pest control operations using about a teaspoon of 1080 per hectare. So that's one really beneficial hazardous substance—but then substances like PFOS and PFOA, those organic pollutants which are used in firefighting foams and have caused significant impacts with their leaching into waterways. 