To: The Food and Drug Administration (FDA), The Department of Agriculture, and The Environmental Protection Agency (EPA)

Subject: Urgent Request for the Prohibition of 2,4-Dichlorophenoxyacetic Acid (2,4-D) in U.S. Agriculture

Esteemed Agencies,

We, a collective of concerned citizens, respectfully implore your immediate attention to the critical issue of 2,4-Dichlorophenoxyacetic Acid (2,4-D) usage in agricultural practices across the United States. This urgent petition is grounded in robust scientific evidence delineating the substantial health hazards associated with 2,4-D. Foremost among these concerns is its designation as a potential carcinogen and its demonstrated propensity for pervasive tissue contamination.

The International Agency for Research on Cancer (IARC), a specialized arm of the World Health Organization, has categorized 2,4-D as “possibly carcinogenic to humans” (Group 2B), a classification that emerged from limited human evidence and substantial evidence in experimental animals. This categorization necessitates a cautious stance regarding the prevalent deployment of this chemical in our agricultural sector. The implications for human health, notably for agricultural workers and their immediate families, are profound and cannot be overstated.

Compelling research has elucidated the capacity of 2,4-D to penetrate biological tissues, posing significant health threats. The study by Uyanikgil et al. (2009) revealed critical alterations in the renal cortex of rats following exposure to 2,4-D, highlighting serious renal health implications. Correspondingly, De Oliveira Mantovani et al. (2021) demonstrated the adverse effects of 2,4-D on cardiac parameters in rats, signifying potential cardiovascular risks. Alves and Oliveira (2014) further substantiated these findings, indicating that 2,4-D disrupts cellular ion transport and pH balance, thereby contributing to its toxicity profile.

Moreover, biomonitoring research, such as the investigation by Alexander et al. (2007), has detected 2,4-D in agricultural families, underscoring not only the risk of direct exposure but also the likelihood of secondary exposure among non-agricultural communities. These revelations demand prompt and decisive action.

Continuing with our urgent appeal, it is imperative to address the broader ecological impact of 2,4-Dichlorophenoxyacetic Acid (2,4-D) on various ecosystems and species, a concern as critical as its effects on human health. The detrimental impact of 2,4-D on the environment is well-documented and presents a perilous threat to biodiversity and ecological balance.

Recent research by Victor Hugo dos et al. (2022) in "Environmental Conservation" illustrates the inability of terrestrial protected areas to shield their streams from external stressors, including pollutants like 2,4-D. Their findings indicate that such contaminants, pervasive in agricultural runoffs, infiltrate protected ecosystems, causing profound disturbances in aquatic habitats. This contamination poses a significant risk to the delicate ecological balance within these streams, affecting both flora and fauna. The implications of this study are alarming, underscoring the far-reaching consequences of 2,4-D usage that extend beyond the immediate agricultural environments into supposedly protected natural areas.

Furthermore, historical analysis by Young and Newton (2004) in "Environmental Science and Pollution Research" delves into the long-term ecological effects following extensive applications of herbicides containing 2,4-D, particularly in areas like Eglin Air Force Base in Florida. Their research sheds light on the enduring environmental impact of 2,4-D, particularly in combination with other herbicides. The study highlights the persistence of these chemicals in the environment and their capacity to cause long-lasting ecological damage. The consequences of such contamination are manifold, ranging from the disruption of natural habitats to the endangering of wildlife species, thereby threatening biodiversity.

These studies collectively paint a grim picture of the environmental hazards posed by 2,4-D. The chemical’s ability to permeate and persist in various ecosystems not only undermines the sanctity of protected areas but also poses a sustained threat to a wide array of species. This situation demands a re-evaluation of the use of 2,4-D in agricultural practices, considering its potential to cause irreversible ecological damage.

Given the substantial evidence of the ecological risks associated with 2,4-D, we implore the FDA, Department of Agriculture, and EPA to consider these environmental factors alongside the aforementioned human health concerns. It is critical to adopt an integrated approach that acknowledges and addresses the full spectrum of 2,4-D's impacts. The urgency to act is paramount to protect our ecosystems and the myriad of species that depend on them.

In light of this compelling body of evidence, we fervently urge the FDA, Department of Agriculture, and EPA to re-evaluate the authorization of 2,4-D for use in U.S. agriculture. The associated risks to human health, especially regarding its carcinogenic potential and pervasive tissue contamination, are of paramount concern and warrant immediate intervention. We advocate for the adoption of the precautionary principle and call for the expeditious prohibition of 2,4-D in agricultural applications, a measure essential for safeguarding public health and preserving environmental integrity.

[References]

1. Uyanikgil, Y., Ates, U., Baka, M., Biçer, S., Öztas, E. & Ergen, G. (2009). Immunohistochemical and Histopathological Evaluation of 2,4-Dichlorophenoxyacetic Acid-Induced Changes in Rat Kidney Cortex. Bulletin of Environmental Contamination and Toxicology, 82(6), 749-55.

2. De Oliveira Mantovani, R., Pinheiro, D.G., De Oliveira, G.L.F., Nobrega, P.S., Teixeira, G.R., Alborghetti, N.G., Veras, A.S.C., de Almeida Tavares, M.E., de Oliveira, M.L. & Lopes, P.F. (2021). Effect of Different Doses of 2,4-Dichlorophenoxyacetic Acid (2,4-D) on Cardiac Parameters in Male Wistar Rats. Environmental Science and Pollution Research, 28(3), 3078-3087.

3. Alves, M.G. & Oliveira, P.F. (2014). 2,4-Dichlorophenoxyacetic Acid Alters Intracellular pH and Ion Transport in the Outer Mantle Epithelium of the Bivalve Anodonta Cygnea. Aquatic Toxicology (Amsterdam, Netherlands), 154, 12-18.

4. Lindenmayer, G., Hoggett, K., Burrow, J., Howard, D., & Falhammar, H. (2018). A Sickening Tale. The New England Journal of Medicine, 379, 75-80. DOI: 10.1056/NEJMcps1716775

5. Alexander, B.H., Mandel, J.S., Baker, B.A., Burns, C.J., et al. (2007). Biomonitoring of 2,4-Dichlorophenoxyacetic Acid Exposure and Dose in Farm Families. Environmental Health Perspectives, 115(3), 370-6.

6.) Victor Hugo dos, S.M., Santos, S., Fernandes, G., Emerson, C.M., Marcelo, M.D., Sônia Maria Vaz, S.C., Osmar, D.P., Zanella, R. & Bartholomei-Santos, M. 2022, "Terrestrial protected areas do not fully shield their streams from exogenous stressors", Environmental Conservation, vol. 49, no. 4, pp. 215-224.

7.) Young, A.L. & Newton, M. 2004, "Long overlooked historical information on agent orange and TCDD following massive applications of 2,4,5-t-containing herbicides, Eglin air force base, sFlorida", Environmental Science and Pollution Research, vol. 11, no. 4, pp. 209-21.