Henry Ford's invention of the Assembly Line probably fits this question. It allowed Mass Production automobile thus dropping the costs greatly.
construction of railroads west of mississippi
The amount of oxygen increased greatly
The process of Amazon rainforest deforestation begin and urban poverty had greatly increased.
The Suez Canal, a man-made waterway in Egypt, greatly increased trade for Britain in India.
The political development that increased tensions between the colonies and Great Britain before the revolution was the taxation that the colonists deemed unfair. Ultimately, England was becoming too controlling.
Increased
Petroleum (oil) was first discovered in North Dakota in 1951 and greatly increased North Dakota's wealth.
After the war, the power of the federal government did greatly increase.
it increased majorly
railroads
carbon dioxide