Since its atmosphere consists mainly of CO 2, a known greenhouse gas, once the planet begins to heat, more CO 2 enters the atmosphere from the frozen reserves on the poles, adding to the greenhouse effect.
Since its atmosphere consists mainly of CO 2, a known greenhouse gas, once the planet begins to heat, the (CO 2) may help lock the heat inside. Moreover, as the planet heats, more CO 2 should enter the atmosphere from the frozen reserves on the poles, compounding the greenhouse effect.