As for overheating, you should talk the the owners from Arizona for advice. They have tried to remedy that problem and may have a solution. Their daytime temperatures can reach 120 F/50 C during the summer day. They also have dust storms. War, well not much can be done to prepare a car for that.
Don't try this at home. It could be dangerous. I have years of experience.
Emissions and fuel economy haven't exactly been areas of strength for past rotary power plants, but absolutely no one with a soul has ever cared.
Rotary History:1982 RX7 GS, 1985 RX7 GSL-SE, 2004 RX8 Sport-Continuous Rotary Owner since 1985
Racing History:SCCA Solo II 1979-1986, Skip Barber Comp School 1983, SCCA Club Racing 1987-1993, 2004-2011 Track Days