The proposed incinerator would create power by burning unrecyclable waste
Plans for a waste incinerator capable of powering up to 30,000 homes have been deferred by Cardiff planners.
The proposed plant on a former copper, iron and steel works would see 250 lorries per day delivering 350,000 tonnes of waste a year to the site.
Environmental campaigners claim there has been insufficient public consultation and the scheme will create pollution and traffic problems.
Environment Agency Wales is holding an event for people to discuss worries.
The agency said the information session at St Albans Community Hall, Splott, on 15 June aims to be a way for people to find out more about the proposed scheme and share their views as part of the consultation process.
Cardiff council has not yet fixed a date to re-hear the application. Councillors said they were waiting for more advice from officers before making a decision.
Would burn 350,000 tonnes of unrecyclable waste per year
Would produce up to 30MW of electricity, enough for 30,000 homes
Sited on Trident Park, 2km (1.25 miles) south east of Cardiff city centre
Would operate on a 24-hour basis with the majority of the deliveries between 7am-5pm
Facility will not have an adverse impact on air quality or human health in the area
Source: Cardiff council report on planning application
Somerset-based firm Viridor Waste Management is behind the application for the energy-from-waste (EfW) proposal on the former NEG glassworks site off Glass Avenue, south of Ocean Way, known as Trident Park.
The proposed EfW building would be 214m (700ft) long, 42m (140ft) - 69m (225ft) wide and 12m (40ft) - 46m (150ft) high, with a 90m (295ft) chimney.
The firm says the facility was needed to meet the move away from landfill as the main way of managing waste both by the European Union and the Welsh Assembly Government (WAG).
A report to the planning committee meeting on Wednesday said the Lamby Way landfill site, the sole point of waste disposal in Cardiff over the 20 years, is due to close this year.
The planning application states the facility is designed to burn up to 350,000 tonnes of residual waste (waste that is unable to be recycled), municipal solid waste and residual industrial and commercial waste sourced within south east Wales.
Opponents say there has not been enough public consultation about it
The heat generated in the incinerator would be used to produce high pressure or superheated steam to drive a turbine to produce electricity or to heat a local water network for a combined heat and power (CHP) network.
The firm said 20 similar plants were operating safely across the UK and, if approved, the plant would be strictly regulated by Environment Agency Wales.
A spokesperson said: "We are positive about the benefits this scheme offers the area. The project is designed to help meet challenging waste management targets in the south Wales area."
Friends of the Earth has claimed that few people living in the nearby Splott area were aware of the development, and that there had not been sufficient consultation with the public.
Around 250 of the 290 objections received by the local authority were copies of a standard Friends of the Earth letter which had been signed and addressed individually by objectors.
Environment Agency Wales said that, as a regulator, it had to ensure industrial facilities were designed, constructed and operated to meet or exceed European standards.
The agency it would not issue an environmental permit if it believed that an energy from waste facility would cause significant pollution to the environment, or harm the health of adjacent communities.
South-East Wales area manager Cliff Moyce said: "Environment Agency Wales is currently considering the application but, before we make any decisions we wanted an opportunity to answer any questions or talk about any concerns that local residents may have.
"We are keen to involve the local community as much as possible on this environmental permit application.
The drop-in session is an easy way for people to find out more about the proposed scheme and share their views as part of consultation process."