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
Chris Coleman said the full-back "did not want to play international football" after naming his squad for next month's World Cup qualifier.
Well it wouldn't be a Bank Holiday weekend without a drop of rain! With some sunshine thrown in!
The UEFA Champions Festival in Cardiff Bay will be the main fanzone for the UEFA Champions League Final in the host city.