What is the DPRK position on climate change? Do they think that the warming climate in the north will be beneficial to them (geopolitically and economically) or will the unpredictable effects of climate change bring further uncertainty to the country?

Not a substitute for a direct answer, but while researching various minister positions in the DPRK a while back, I found that the Food and Agriculture Organization of the UN (FAO) has done work in the North. An excerpt from them on climate change and Korea:

The DPR Korea is seriously affected by climate change. During the last 100 years, temperature changes have affected rainfall patterns and brought frequent occurrences of extreme weather including floods and droughts, which in turn impacted on socio-economic development and people’s livelihood.

The occurrence of frequent natural disasters, mostly caused by erratic and often extreme climatic conditions have significantly contributed to making agricultural production unstable and, hence, to insufficient food supply and national food insecurity in DPR Korea. Natural disasters have the effect of negative impacts twice on food and agricultural sector since these not only damage the crops in the current year but also the infrastructures and material basis for production in the subsequent years. Their impacts last long and, in many cases, extra budgets are needed for rehabilitation.

I am not knowledgeable about North Korea other than dumb western propaganda which I believe to be mostly false because they lie about everything else, but nowhere is safe from climate change and everywhere it is a risk. One of the biggest factors of climate change is the changes in the jet stream are going to make weather completely unpredictable and extreme. For example, a heat wave in northern Canada and a foot of snow in Louisiana US.