RTÉ omitted climate change from the debate

I’m sure the leaders participating in the debate have genuine opinions on climate change but it seems RTÉ felt it didn’t merit air time. This despite the huge effort exerted in Paris the end of 2015 to reach an agreement to reduce the impact of climate change.
Maybe they felt the solution, which requires a move to a more sustainable economic model, might prove too difficult a topic for the establishment parties and their acquiescence to unsustainable growth-based orthodoxy?