Honey is a surprisingly effective tool for monitoring the levels of lead in the environment. It could be used in places where sampling is hard to organise
Source:
https://www.newscientist.com/article/2214050-we-could-use-bees-honey-to-track-environmental-lead-pollution/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home