What impact can improper fumigation have on the environment?

Improper fumigation can significantly harm non-target species, which includes wildlife, beneficial insects, and plants that are not intended to be affected by the fumigant. The chemicals used in fumigation can drift away from the intended area due to wind or misapplication, leading to unintended exposure. This can result in deaths of species that contribute to the ecosystem's balance, disrupt predator-prey relationships, and negatively impact pollinators essential for plant reproduction.

In contrast, the other options suggest outcomes that are either unrealistic or overly optimistic regarding the effects of improper fumigation. Increased biodiversity is not a likely result of harmful chemical application; rather, it would usually lead to a decline in species diversity. Stating that improper fumigation has no environmental impact ignores the potential dangers and consequences that arise from chemical exposure to non-target organisms. Similarly, claiming that it improves the health of nearby ecosystems contradicts the reality that chemical exposure can lead to ecosystem degradation and loss of health.