Childhood Cancer Caused Largely by Environmental Factors, Report Finds
By Jeremy Loffredo
For children in the U.S., cancer is the leading cause of death from disease. Worldwide, cancer has become so prevalent and devastating that some may use the phrase “like curing cancer” when describing something unfeasible or highly complicated. Yet in September, a team of more than 60 stakeholders and leaders in the health, science, business, policy and advocacy sectors collaborated to take a different, perhaps less flashy approach — preventing cancer, specifically by ending the use of toxic chemicals. Under the umbrella of the Childhood Cancer Prevention Initiative (CCPI), this collection of organizations published a report examining the impact of different cancer-causing chemicals and calling for a “national plan” to address the rising incidence of childhood cancer.
In 2020, an estimated 1,806,590 new cases of cancer will be diagnosed in the U.S. and 606,520 people will die from the disease, including an estimated 16,850 children and adolescents ages 0 to 19 being diagnosed and 1,730 children will die of the disease. Researchers estimate that only 10% of all childhood cancers come from hereditary factors, meaning the lion’s share of childhood cancers come from environmental factors. To CCPI, this means 90% of all childhood cancer is preventable.
The authors of the report indicate that cancer charities and research organizations don’t devote enough resources to prevention.
“The vast majority of childhood cancer research funding goes towards studies of childhood cancer treatment and survivorship, leaving only a small portion for the critical work on prevention,” the report explains.
The CCPI report identifies pesticides, traffic-related air pollution and paints/solvents as the three groups of chemicals giving rise to the most common types of childhood cancer.
The report points out that the World Health Organization’s International Agency for Research on Cancer (IARC) has listed several U.S. Environmental Protection Agency-approved pesticides as either known, probable or possible carcinogens, including glyphosate. The report cites multiple studies that indicate increased risks of childhood leukemia and brain cancer with exposure to residential pesticides, including a recent study showing “increased risk of childhood leukemia associated with higher levels of the residential herbicide chlorothalonil and possibly alachlor, used as an agricultural herbicide.” It also explains that a child with parents working in the agriculture sector is more likely to have a brain tumor, because of their exposure to agricultural pesticides.
The IARC has classified many air pollutants as known, probable or possible carcinogens as well. CCPI describes one study demonstrating that “soot in air pollution, which is a mixture of known carcinogens … can cross the placenta and expose the developing fetus.”
The report explains that a third category, paints and solvents, can increase a child’s risk of leukemia, lymphoma and brain tumors. For example, benzene is a chemical present in many solvents and a known cause of leukemia. The CCPI report lists multiple studies documenting that a mother’s exposure to benzene during pregnancy puts the child at elevated risk for childhood leukemia.
The authors furthermore acknowledge that children living near industrial manufacturing, agricultural facilities, major transportation routes or hazardous waste sites are at a higher risk for chronic diseases.
CCPI also emphasizes a need for research into the more than 85,000 manufactured chemicals in use in the U.S. today. “Known carcinogens are used throughout the economy … but recent research suggests that many chemicals in addition to those known to be carcinogens may contribute to cancer,” the report reads. “Because most of these chemicals have never been tested for safety or toxicity, we do not have a comprehensive list of those that may cause cancer in children.”