Give Me Air! — Mary Ellen Wall

In the next century, rising ocean level create a refugee crisis. The less fortunate get transferred to a colony planet far away. The air on the exile colony planet Tenembras was always tenuous, now it's killing people. After the violent uprising and a massive volcano, many folks see Elise and her alien friends as the valiant rescuers as they can mine critical ores to repair air systems and pull water from the deserts. Meanwhile the new leaders want to free a Patriot prison's tortured inmates and a worse volcano is about to blow which will challenge their marginal air supply. Nothing is as easy as it looks. The alien and communist haters are still out there, devising new ways to kill.