Dumfries and Galloway Council has received reports about palm oil being found on beaches across the region.
The BBC finds evidence of fraud in the production of a "green" diesel meant to cut emissions.
The coastguard says the substance poses a serious risk to dogs and that owners should keep them on a lead.
The great apes are proposed as gifts for palm oil importers, but conservationists voice concerns.
The council in Gwynedd said "significant" amounts had been found washed up on the coast.
Two of Northumberland's beaches have reopened after palm oil was found washed ashore.
An Edinburgh food research team produces a lower-fat alternative aimed at cutting palm oil dependence.
Lucy Beswick’s three-year-old dog died after eating a substance on Newgale beach, Pembrokeshire.
The States of Guernsey warned about the "waxy substance" after a sighting at Pembroke.
