Anti-pollution and waste campaigners Environmental Protection UK (EPUK) has launched a consultation on new advice for local authorities assessing combined heat and power (CHP) developments.
The draft guidance, which was developed with Camden Council in London and funded by Defra, covers CHP systems in the 50kWh to 20MWh size range, incorporating common technologies and fuels including waste.
The document is intended to help officers and elected members in England and Wales decide on individual planning applications.
It urges councils to carefully consider how to mitigate harmful nitrogen dioxide emissions. EPUK warned it was possible for a CHP plant to raise emissions locally even if overall emissions fell through decommissioning old boiler systems.
The deadline for responses to the consultation is 2 January.
EPUK has also announced it is facing closure after revealing it does not have enough income to continue with paid staff.