The two proposed sites for a new incinerator have attracted opposition from local groups concerned about the impact on the environment.
Cardiff Against the Incinerator and Stop Newport Incinerator say that a better solution to domestic waste would be to increase recycling targets.
The two bidders, Veolia and Viridor, say that the plans represent a major investment and electricity generated by the incinerator will help power local homes and businesses.
More top news
71-year-old Raymond Hodges was convicted of 24 charges spanning almost a decade.
The Cardiff arts centre scrapped the event after critics deemed the fun run "sexist".
Emma Picton-Jones' husband died last summer. Now she wants to help others in the agricultural industry talk about mental health.