Penguin guano is scientific tool

Australian scientists are uncovering a clearer map of where pesticides are ending up in the environment - and it is penguin guano that is leading them there.

Many of the Persistent Organic Pollutants (POPs) that have been found in the penguin guano were banned under the UN's Stockholm convention in 2001.

The pesticides are still concentrating in the penguins because it takes so long for them to break down.

Source: ABC News