Question

Explain how major environmental policies came about.
short paragraph

Answer 1

Major environmental policies grew out of a mix of scientific discovery, visible crises, public outrage, political leadership and international diplomacy: early conservation laws responded to over‑exploitation, mid‑20th century pollution disasters (e.g., London smog, Cuyahoga River fires) and books like Rachel Carson’s Silent Spring spurred the modern environmental movement and national laws such as the U.S. Clean Air Act, Clean Water Act and the creation of the EPA. Growing scientific evidence of global problems led to international agreements—Montreal Protocol for ozone, then climate treaties like Kyoto and Paris—while courts, NGOs, industry interests and economic tools (regulation, permits, taxes and tradable credits) shaped how those goals were implemented.