What is the Green Revolution in the essay Lifeboat Ethics?

In "Lifeboat Ethics," Garrett Hardin discusses the Green Revolution as a significant agricultural transformation that increased food production, particularly in developing countries, through the use of new technologies, high-yield crop varieties, and chemical fertilizers. While it alleviated hunger for some, Hardin argues that it also led to overpopulation and environmental degradation, highlighting the ethical dilemma of resource distribution. He suggests that the benefits of the Green Revolution are not universally sustainable and raises concerns about the moral implications of helping populations that may ultimately strain global resources.