Waste is generally considered hazardous if it (or the material or substances it contains) are harmful to humans or the environment. Examples of hazardous waste include: asbestos, chemicals, such as brake fluid or print toner, batteries, solvents, pesticides, oils (except edible ones), such as car oil, equipment containing ozone depleting substances, like fridges, hazardous waste containers. For more information visit the Gov Website – https://www.gov.uk/dispose-hazardous-waste