Producing district heat and electricity through waste incineration is an efficient and climate-sound solution for waste that cannot be recycled. However, incineration of waste generates flue gas waste, fly ash containing heavy metals and chlorides and a contaminated acid. Today the hazardous fly ash is transported to specific landfill sites, especially in closed mines according to the "hide and forget" philosophy. This is not sustainable nor in line with a circular green community. The HaloSep process is unique with a solution managing all the issues of fly ash by recovering salt & metals and reducing the landfill volume. What is also unique is that HaloSep provides an on-plant solution that can be built up locally at a Waste to Energy plant or consolidation of fly ash from several smaller plants, thereby eliminating cost and emissions related to long range transportation. We now have the opportunity to build for a better global future!