Injunan GTL Cummins ba kawai sanannun sanannun aji na farko ba ne, dorewa da tattalin arzikin mai, amma kuma suna saduwa da iskar hayaki mai ɗorewa (US EPA 2010, Yuro 4 da 5), fitar da kayan aikin kashe-kashe (Tier 4 wucin gadi/Mataki) IIIB) da kuma iskar jirgi (IMO IMO standards) sun kasance jagoran masana'antu a cikin gasa mai tsanani.