Earlier this year, Duarte contacted me after reading an op-ed I’d written about the widely used pesticide chlorpyrifos. I’d discovered that the likely reason for each of my three children’s brain malformations was due to my acute exposure, in 1989, to a flea “bomb” containing chlorpyrifos. Duarte believes his ADHD and impulsivity issues are the result of his chronic exposure to chlorpyrifos in his home, school and work environments.

Human and animal studies link chlorpyrifos exposure to structural damage to the brain, neurobehavioral deficits, asthma, diminished IQ, and a wide range of developmental disabilities in children. It has also been linked to heart disease, lung cancer, Parkinson’s disease, and the lowering of sperm counts in adults. Based on my investigative research, and interviews with Duarte along with dozens of other residents in the San Joaquin Valley, I’m left to draw the all-too-obvious conclusion that communities with a higher percentage of residents who are low income are at greater risk of being exposed to harmful pesticides and other environmental toxins. And the issue of race is an inextricable co-factor.

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Duarte’s alcoholic father abandoned the family when Duarte was nine, about the time his mother was diagnosed with leukemia. (Both pediatric and adult leukemias have also been linked to pesticide exposure.) Duarte, the third of four children, became the man of the house and remembers making meals for his sick mother and biking to the pharmacy to pick up prescriptions for his mom and younger brother, who had severe asthma.

Both Duarte and his brother were diagnosed with ADHD by a school psychologist at Di Giorgio Elementary School. Duarte does not recall being provided treatment or support from the school, which likely speaks to Di Giorgio School District being highly under-resourced, given the district’s meager tax base. Like their home on Richardson Road, the school abuts an orchard where pesticides are routinely sprayed.

And if exposure at home and school weren’t enough, before leaving the family, the boys’ father was a fieldworker who would have likely brought home pesticide residue on his clothing and shoes. Duarte himself worked as a field hand as a teenager and also at a golf course collecting stray golf balls. (Chlorpyrifos is widely used in non-agricultural settings like golf courses and golf balls are commonly thought to be a source of pesticide residue.)

The EPA banned chlorpyrifos in household products in 2000. However, its use in agriculture was allowed to continue. It’s often small, rural, low-income communities of color that bear the cumulative impacts of pesticide exposure and environmental degradation.

Nowhere is this more evident than in communities like Arvin, located in Kern County at the southern tip of the San Joaquin Valley — the most productive agricultural region in the country. Millions of pounds of chlorpyrifos are used each year nationwide. In 2016, 1.1 million pounds were used in California; more than a quarter of that total was used in Kern County alone.

According to the 2010 Census — about the time Duarte would have been taking on the man-of-the-house role — Hispanic or Latinx persons made up 92.7 percent of Arvin residents. Arvin’s average per capita income in 2010 was $9,241, or only 19 percent of the U.S. average of $48,880 at the time. Today, the percentage of families living below the poverty line in Arvin is more than double the national average.

That low-income communities of color are disproportionately impacted by the health effects of chemical toxins such as chlorpyrifos is not news, nor is it an accident. People of color disproportionately hold the most physically demanding, unpleasant, and low-paying jobs. The roots of the problem trace back to the legacy of state-sanctioned racial segregation. For instance, communities with high Latinx representation such as Salinas, Visalia, Santa Rosa, and San Luis Obispo, California, rank among the lowest U.S. metropolitan areas in employment opportunity. Not only have low-income families and people of color been segregated according to residence and work, they’ve consequently been forced to play host to the worst kinds of environmental burdens.

Both of Angel Garcia’s parents worked the fields when he was growing up. He is now the head of the Coalition Advocating for Pesticide Safety. “If you drive through the Central Valley from town to town you will realize the proximity of these homes to the fields,” says Garcia. “You can speak to many community residents who will tell you ‘oh, it’s that time of the year where I have to close my windows, shut my door, not let the kids go outside.’ It’s almost normalized but I don’t want to say it’s normalized because I feel like it not normal. It’s just so common.”

Sacrifice zones are hot spots of chemical pollution where residents live or work immediately adjacent to heavily polluted industries or military bases. The Gulf Coast post-Deepwater Horizon, Cancer Alley in Lousiana, a Tesla plant built on a Superfund site in Buffalo, and polluted neighborhoods surrounding Houston’s shipping channel are but a handful of examples of locales where public officials have turned a blind eye to extreme environmental contamination in minority-dominated areas so that society at large can reap the rewards of a robust economy. This pattern of unequal protection constitutes environmental racism.

The San Joaquin Valley in general and Kern County in particular are examples of sacrifice zones. Here, the burden of the vibrant agricultural economy is carried by those predominantly-Latinx workers who pick and pack the fruits and vegetables that feed America. The health risks associated with these jobs and attendant living conditions have been well documented, but perhaps no more strikingly than by the CHARGE study conducted by UC Davis’ MIND Institute, and led by epidemiologist Irva Hertz-Picciotto, PhD.

Dr. Hertz-Picciotto and her team questioned mothers living in California about what their health was like before and during pregnancy, linking this information to another set of data that the state keeps, a pesticide-use reporting system. Their findings — that the incidence of developmental disability increases significantly in areas where pesticides are applied — bolster previous research and have dire implications for families working and living in agricultural communities near where pesticides are applied.

Garcia and others, such as Nayamin Martinez of the Central California Environmental Justice Network, have led recent caravans to Sacramento to lobby their state representatives and organized an environmental bus tour that highlighted hot spots and problem issues throughout the region. To their credit, the tour was attended by the newly appointed Cal EPA director, his director of the Department of Pesticide Regulation (DPR), and a lone local agriculture commissioner.

Garcia and Martinez’s organizations also advocate for larger pesticide-free buffer zones surrounding schools, an Amber Alert-like notification system that would notify residents of pesticide applications in their vicinity, and more sustainable agricultural practices. “We will never stop pushing for greater health protections for low-income people of color,” says Martinez, “but the fact of the matter remains that most of the jobs in this region are agricultural.” Martinez, Garcia, and others in the environmental justice movement recognize they must find a win-win roadmap for both the residents who depend on those jobs and the industry that provides them.

Their largest “victory” to date may provide just such a road map. In April, as a result of the overwhelming scientific evidence and intense lobbying from environmental justice groups, the California Environmental Protection Agency, flying in the face of the federal EPA’s example, directed the state’s DPR to begin the process of banning chlorpyrifos throughout the state. After initial resistance, the chemical industry gave up its fight over the ban, which is now expected to go into effect in early 2020. It is the first time in the history of California that a pesticide’s registration has been revoked. To sweeten the bitter pill that industry is being asked to swallow and to help farmers make the transition away from chlorpyrifos, the state is adding $5.7 million to fund research into safer and more sustainable alternatives.

As for Gabrial Duarte, he is currently awaiting trial at Laredo Pretrial Facility in Kern County on charges stemming from illegal gun possession. He has spent two and a half of the past five years in detention, first in juvenile detention, and currently while awaiting trial. After our first conversation at the prison in July, he asked to be seen by a mental health professional and has since been prescribed medication for his ADHD. He is also attending anger management classes.

“Before, I was a reckless renegade,” he told me over the phone. “Now, I think things through. I ask myself, ‘if I were to do this, how would you view it, how would they view it, and how would I view it’? It [the classes] has helped me to learn empathy.”

When it comes to hazardous working conditions on American farms, many people think of pesticide exposure; as early as the 1960s, farmworkers were ringing alarm bells about it. But heat stress has actually surpassed pesticides — which cause cumulative harm over time — as the most immediate lethal danger in the fields, according to Dr. Marc Schenker, distinguished professor of public health sciences and medicine at University of California Davis. “We don’t see acute deaths from pesticide poisoning anymore,” says Schenker (though pesticides are still recognized as a significant danger with severe health risks for people exposed to them).

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An estimated 2.5 million farmworkers across the United States endure dangerously hot conditions on the job. As the heat climbs, workers can start to develop symptoms of heat stress including dizziness, nausea, fainting, vomiting, fatigue, poor coordination, and seizures. As their organs, especially their kidneys, start to break down, they can fall into a coma and die if not treated. Between 1992 and 2006, 68 farmworker deaths attributed to heat exposure were reported. Limited access to more current data makes it challenging to uncover the depth of the problem, though advocates claim deaths are likely underreported.

Outdoor temperatures aren’t the only issue. Personal protective equipment, ranging from suffocating Tyvek suits worn for pesticide application to thick trousers and heavy boots for working around thorny plants, can add to farmworkers’ misery.

“In workers, the major producer of body heat is metabolic workload,” explained Schenker. “If you’re working in outdoor conditions, you’re generating the majority of body heat from metabolism. The simple prevention is to reduce workload.” The piecework rate of payment for farmworkers, in which people are paid by the pound rather than by the hour, is a recipe for working as hard and as fast as possible. The system is great for employers, but bad for workers.

Access to drinking water, shade, and rest can help workers manage their body temperatures in high heat conditions. But just two states, California and Washington, have laws that require sufficient shade structures and drinkable water be nearby to meet the needs of the work crew. The Coalition of Immokalee Workers’ Fair Food Program, in which companies like McDonald’s and Trader Joe’s pay a premium for more ethically-sourced tomatoes, also requires access to shade, drinking water, rest breaks, and hygiene facilities as part of its code of conduct.  But even those requirements aren’t always enough.

In 2008, a 17-year-old pregnant farm worker died of heat-related illness because the drinking water was too far away, despite the fact that California’s heat protection law dated to 2005. Outcry led to enhanced safety regulations and better enforcement, but despite a dedicated heat violation hotline, improved data collection, and a push for better internal auditing to ensure complaints are investigated in a timely fashion, the problem persists.

Even if they have access to preventative care in the field, workers face another heat-related challenge when they go home: Farmworker housing may consist of crude shacks operated by farmers or contracting companies, or hot trailers with no air conditioning. Leydy Rengel of the United Farm Workers Foundation recalls the extreme heat of the Coachella Valley beating down on the trailer she shared with her parents, both farmworkers, as a child: “My parents would come home after 10-hour shifts, and didn’t have a place to cool down.” This can be dangerous, said Schenker: “Nighttime cooling is an important factor in preventing heat stress illness.”

While the short-term implications of heat-related illnesses are well understood, not as much is known about what they mean for people in the long term. Schenker is researching this subject, with a particular interest in what happens if workers experience repeated incidents of acute kidney injury, a potential complication of heat stress. This is especially vital since climate change is making conditions for farmworkers even worse.

California’s most recent climate assessment warned that if greenhouse gas emissions continue at their current rate, the state’s average daily high temperature could be as much as 8.8 degrees Fahrenheit higher from 2070-2100 than it is today. Over that same period, the annual number of extreme heat days (over 103.9 degrees) could rise from four to twenty-four. The amount of land scorched in wildfires will increase 77 percent.

In California, the law protecting workers from the effects of high temperatures is clear, but enforcement has been erratic. The UFW Foundation was one of the entities that pushed the state to issue more clarity and direction to keep farms — and the contract companies that supply a large number of farmworkers — accountable. Schenker, who has spent years researching farmworkers, said “California really does lead the nation,” but what that can look like from farm to farm is highly variable.

During the recent high heat event, the UFW Foundation ran an awareness campaign encouraging people to report unsafe conditions and setting up tables at locations farmworkers frequent to educate them about their rights. Rangel said even with the promise of anonymity, workers were reluctant to report. “They’re rather just be quiet,” she said, especially when they’re undocumented. And when state officials may take days to respond, complaints don’t always lead to enforcement.

Outside California and Washington, the picture can be grim for farmworkers in high heat conditions. They have some protections under the Occupational Safety and Health Administration, but for farmworkers, especially undocumented people in isolated areas, knowledge of the law and the ability to ask for enforcement can be limited.

“Last year, there was a 24-year-old farmworker, an H2-A guest worker in Georgia, who had only been in the country for less than 10 days, and he suffered heat illness. Nobody paid attention, his employers were not informed of how to handle this. They thought he was just being lazy,” said Rangel. It wasn’t the first time an ill worker had died in similar circumstances.

As consumers grow more aware of concerns around farmworker health and safety — calling, for example, for restrictions on pesticide use and listening to farmworkers speak out about sexual abuse in the field — heat illness should be a more prominent topic of conversation. Just as hotter days and longer summers will affect the quality of crops, they’ll affect the quality of life for the people who cultivate and harvest them.