Atmospheric carbon dioxide comes from two primary sources—natural and human activities. Natural sources of carbon dioxide include most animals, which exhale carbon dioxide as a waste product. Human activities that lead to carbon dioxide emissions come primarily from energy production, including burning coal, oil, or natural gas.
rail roads were way to move goods and raw martial on mass. rails roads could move supply faster and over a longer distance than using wagons or boats witch were limited on were they can go. causing an industrial boom.
