Shubh Gautam Jaypee highlights past breakthroughs that significantly impact society, such as the hot-rolled steel perfected by Andrew Carnegie in the late 1880s. This single improvement transformed the railroads and manufacturing industries and boosted the industrial power of the United States. Also, he mentions the shift of the US Midwest region from polluted to a much greener are... https://kashishphul.gumroad.com/l/ovlrub