Say NO to Pesticides
Say NO to Pesticides is a column in the Yarducopia newsletter written by ACAT's Science Writer Saoirse McAdams. Send your questions and comments to [email protected] - Enjoy!
December, 2025
Every December, millions of people worldwide purchase Christmas trees to decorate for the holidays, but the nostalgic sight and smell of a fresh cut tree can come with hidden chemical costs. Conventionally grown Christmas trees are often treated with pesticides and herbicides over their multi‑year growth cycles to control pests, weeds, and diseases. Common chemicals used in large-scale tree production can include glyphosate, chlorpyrifos, carbaryl, and others linked to health risks like endocrine disruption, neurological effects, reproductive harm, and cancer. These chemicals don’t just stay on the farms where they’re applied; residues can persist on tree needles, bark, and sap, potentially exposing farmworkers and consumer families to toxic chemicals, and can leach into soil and waterways, affecting local ecosystems. Farm workers in particular can face chronic exposure, increasing risks for adverse health outcomes when protective measures are inadequate. (source Beyond Pesticides)
Others may opt for purchasing artificial trees, which may seem like a lower‑maintenance choice, but they bring their own set of health and environmental concerns. Most artificial trees are made from polyvinyl chloride (PVC) plastic, which can contain additives like lead, phthalates, flame retardants, and other volatile organic compounds (VOCs) that can off‑gas into indoor air and settle as dust in the home. These substances are associated with respiratory irritation, hormone disruption, neurodevelopmental impacts in children, and long‑term chronic health issues, and the production and disposal of PVC releases persistent pollutants like dioxins into the environment. Because artificial trees are not biodegradable and are typically manufactured overseas with high energy inputs, they also contribute to plastic pollution and greenhouse gas emissions when discarded. (source Center for Health Justice)
For the yuletide decorators who are seeking non‑toxic, sustainable alternatives, there are many creative options that support both health and local ecosystems! Decorating houseplants you already own can bring festive greenery indoors without introducing new chemicals or plastics. You can also make your own garlands out of evergreen clippings to hang around your home. In many states including Alaska, responsible harvesting of your own tree from public lands (where permitted) can provide a free, low‑impact option as long as local regulations and sustainable practices are followed; remember to take only what you need, avoid sensitive habitats, and leave enough vegetation to support wildlife and soil health. Click this link for more details on where you can harvest your own tree from the Department of Natural Resources! Choosing organic or pesticide‑free trees from local growers helps minimize chemical inputs and supports community agriculture, while potted trees that can be replanted after the holidays offer a living legacy. Making these small changes help keep toxic chemicals out of your home, ensure safer working conditions for farm workers, reduce pressures on our local ecosystems, and celebrate the season in ways that align with environmental justice values. Happy holidays from ACAT!
November, 2025
Using chemical pesticides indoors to control fungus gnats is dangerous. Most products are toxic even when used outdoors as directed, and health risks increase when used in enclosed spaces.
Organophosphate pesticides like malathion are especially hazardous to your health. They’re designed to attack insects’ nervous systems but can also harm humans, causing headaches, dizziness, nausea, confusion, muscle weakness, or even seizures. Children are particularly vulnerable, and residues can linger on household surfaces and dust. Pyrethroid sprays and foggers (e.g., Raid or Ortho Home Defense) are less acutely toxic but can still irritate the eyes, skin, and lungs, and may cause neurological symptoms such as tingling or headaches. Foggers also leave residues that increase long-term exposure risks, especially for kids and pets.
Safer alternatives include biological controls like Bti (Mosquito Bits, Gnatrol) and beneficial nematodes (e.g., Steinernema feltiae). These target fungus gnat larvae without posing health risks. For best results, combine these with simple practices: let soil dry between waterings, improve drainage, and use yellow sticky traps. Together, these provide an effective, low-toxicity solution without relying on harsh indoor pesticides.
