(Answered) What is a public good and give a example?What is a public good and give a example?

➤ How do non-excludability and non-rivalry work in practice?
Non-excludability means providers cannot easily prevent non-payers from using the good. Non-rivalry means one person’s consumption does not lower the product available to others. In practice, broadcast signals and clean air show both traits. When exclusion or rivalry appears, the good may need regulation, pricing mechanisms, or public funding to manage access and maintain quality.