i totally agree that there have been avoidable and horrific famines in marxist countries due to inept attempts at central management of agriculture. these days, there's also a bit of ugly conflict popping up along ethnic lines in some countries where populations are under stress for access to enough farmland for subsistence agriculture vs grazing (environmental pressure will be part of this).

i dont think there's much distinction between marxist countries and capitalist western countries when it comes towards climate change, we all love nice cheap coal and oil now.