Hello, I need help with today's homework.

1. Give an example of a positive externality you experienced or produced recently. Explain why it is a positive externality.

2 . Give an example of a negative externality you experienced or produced recently. Explain why it is a negative externality.

3. Are any of the externalities you described above causing severe problems? If so explain why. What solution would you propose to deal with this problem?

4 . Are externalities efficient? Explain clearly.