I didn't invent the term. It was created at Apimondia 2009, in Montpellier. The Apimondia's theme was “The Bee, Sentinel of the Environment”. A single colony of bees can have about ten foragers. In other words, as soon as the weather becomes warm, 10,000 bees leave and touch everything. They then return to the colony and bring back everything around it, including all the residue in the environment. Work was done to collect the pollen in the hives and measure the variety of pesticides or products found in nature. It's incredible! The bees live in these environments and accumulate these substances. They're good indicators.
A company near our research centre had two hives. Each week, the company took samples to verify whether the fumes from its chimney affected the environment. It's not new.