More and more practices are reflecting their clients views on trying to reduce their carbon footprint – you might find this article an interesting read and it puts some numbers re this against the animals you are treating, to help you start to make plans,
https://www.veterinary-practice.com/article/the-carbon-footprint-of-the-animals-under-our-care#:~:text=The%20environmental%20issues%20surrounding%20the,and%20water%20and%20soil%20health.