Sources: 25m: Hog population: USDA NASS, Quarterly Hogs and Pigs, June 2026. Human population: US Census Bureau, Vintage 2025 estimates | Fivefold: Data: Environmental Working Group. 1990 and 2019 figures from EWG’s 2020 analysis; 2025 figure from EWG’s 2026 analysis. Large CAFOs are those housing 1,000 or more animal units (1,000 cattle, 714 dairy cows, 2,500 hogs or 100,000 laying hens) | 79%: Share of Iowa voters who support introducing mandatory requirements for industrial agriculture to reduce pollution. Data: Global Strategy Group poll of 600 Iowa registered voters for Food & Water Action, Jan–Feb 2026 | Rising: Data: CDC WONDER. Average incidence for 2018-22 inclusive by US state, age-adjusted to the 2000 US standard population. All invasive cancer sites combined, all ages, both sexes.
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