Well the first step is to reduce or at least drastically eliminate the amount of CO2 that is being released in the first place. Removal of carbon from the air is necessarily going to have to be a down the road plan. It literally cannot happen to any scale if we are still relying on fossil fuels in the first place.
What’s really weird is that the sun seems to be setting in the same place that the sun and moon are rising. Clearly their entire room is rotating as they sleep. (Along with their little miniature city skyline on their windowsill.)