It reduces the per unit fixed cost. As a result of increased production, the fixed cost gets spread over more output than before. It reduces the per unit variable costs. Economies of scale bring down the per unit variable costs.
I think it is true but please don't just get from me ask others to please
This is a bit tricky, but in general, it is climate change that is the source of the greatest disagreement among American politicians, because some people still think it doesn't exist.