What factor is cited as the crucial driver for the widespread adoption of the sanitary landfill model post-World War II?

Answer

Legislation that effectively outlawed older, dangerous open dumps

The move away from open dumping and toward engineered solutions was largely mandated by necessary legislation enacted during the post-WWII era, spurred by increasing environmental awareness.

What factor is cited as the crucial driver for the widespread adoption of the sanitary landfill model post-World War II?
inventionHistorywastesanitationlandfill