Required reductions for reaching low greenhouse gas stabilisation levels are technically feasible at likely range of direct costs in the order of 1-2% of GDP, but this will require immediate action, a broad range of options and worldwide participation in mitigating greenhouse gas emission. This is the main finding of a study documented here to investigate options for low stabilisation targets. Recent studies have shown that the EU target to limit global mean temperature increase to a maximum of 2 degrees Celsius can only be reached with a reasonable degree of certainty if greenhouse gas concentrations are stabilised at low levels (i.e. around 450 ppm CO2-eq or less; see also this report). Most studies so-far have considered much higher stabilisation targets.