The information presented here is adapted from these sources:

ARC2020: Agricultural and Rural Convention
Pesticides, Tear Gas and History | From WW1 to Today’s Streets

Environmental Integrity Project
Re: Letter Objecting to Blanket EPA Waivers for Polluters During Coronavirus Crisis and Calling for EPA to Protect Public Health

Environmental Justice for All
Life at the Fenceline: Understanding Cumulative Health Hazards in Environmental Justice Communities

Harvard TH Chan School of Public Health
Exposure to air pollution and COVID-19 mortality in the United States: A nationwide cross-sectional study

National Archives: Hoover Heads
Bonus Army

National Park Service
Bonus Expeditionary Forces March on Washington

Science Direct
Capsicum Oleoresin

Choking Dissent: How Tear Gas is Used to Crush Protests

How Keeping Your Food Bug-Free Is Hurting Countless Women

Trump’s EPA Is Unleashing the Pollution That Makes Us Vulnerable to COVID-19

United States Environmental Protection Agency
COVID-19 Implications for EPA’s Enforcement and Compliance Assurance Program
COVID-19 Implications for EPA’s Enforcement and Compliance Assurance Program: Addendum on Termination

US History
The Bonus March

The disturbing history of how tear gas became the weapon of choice against protesters