After 15,000 years, it's waking up

More CO2 the more plants can thrive on the surface, and more food that can be produced. Carbon is not the problem. The problem is the chemicals and industrial waste. Do they not think that using radar and other forms of detection that use carbon are not going to thaw the surface more? Also how would you find signs of life at the pole unless there was a greener past that has shown that life can flourish under those conditions.