Final answer:
A major change from the Green Revolution is the synthetic production of nitrate containing fertilizers, which significantly increased crop yields. Therefore, the correct option is B.
Step-by-step explanation:
One major change brought about by the Green Revolution is B. Synthetic production of nitrate containing fertilizers. This innovation played a critical role in increasing the yields of crops worldwide. The Green Revolution introduced high-response varieties of crops like wheat and rice, which, when combined with the expanded use of irrigation systems, synthetic fertilizers, and pesticides, dramatically increased agricultural production. Norman Borlaug's contributions to developing drought-resistant and pest-resistant crops also helped in expanding the regions where food crops could be grown, further contributing to the increased food production. Although these advancements have come with several environmental and social costs, including soil degradation, increased farmer debt, and reliance on synthetic chemicals, they have nevertheless led to significant increases in crop yield.