firewood has become so expensive that what goes under the pot is costlier than what goes inside meaning of this - English - The Ailing Planet the Green Movement\s Role

Question

firewood has become so expensive that what goes under the pot is
costlier than what goes inside meaning of this line?

Amrapali · Accepted Answer

It means that the cost of what is being cooked is much lower
than what is being used for cooking that Firewood is so expensive
that one cannot afford it anymore, the resources for cooking have
become far more expensive than the ingredients

firewood has become so expensive that what goes under the pot is costlier than what goes inside meaning of this line?