You rent a warehouse/piece of land in Poland claiming to be a transportation/construction/recycling company usually using forged documents or homeless person fronting whole thing.
You get paid to remove hazardous waste from UK/Scandinavia/Germany, you stockpile until the place is full.
Finally you either set the place on fire to cover your tracks, or the owner stops receiving payments, discovers whats stored on his property and decides to take insurance hit instead of having his assets blocked for several years while courts try to figure out if/what/who is going to pay for lawful disposal.
Just 2 days ago https://wielun.naszemiasto.pl/kolejny-pozar-skladowiska-w-na... already mentions one from one week earlier. https://portalkomunalny.pl/gospodarka-odpadami/pozary-sklado... Usually couple a month up to one a week, year after year for the last >10 year. Seemingly no political will to fight this scheme.