Air fresheners which plug into wall sockets, or just the ones you get in aerosol forms are extremely toxic.
From allergic reactions to hormone disruption and cancer, air fresheners are extremely dangerous.
The natural alternatives include air-cleaning house plants, such as the ones on this list:
https://greatist.com/connect/houseplants-that-clean-air
You can use an essential oil diffuser to substitute air fresheners.
Other great info:
https://draxe.com/dangers-synthetic-scents/?utm_campaign=Live-Mar-2018&utm_medium=social&utm_source=youtube&utm_term=dangersofsyntheticscents
