What is a common characteristic of pesticides that are stored improperly?

Pesticides that are stored improperly can indeed degrade and become hazardous due to various environmental factors such as temperature, humidity, and exposure to sunlight. When pesticides are stored in conditions that do not meet the manufacturer’s guidelines, they can undergo chemical changes, leading to the formation of by-products that may be more toxic than the original compound. Furthermore, degradation can result in substances that are no longer effective for their intended purpose, posing additional risks to human health and the environment.

Proper storage is critical to maintaining the integrity and safety of pesticides, ensuring that they remain effective and pose minimal risk. Thus, the characteristic of improper storage leading to hazards is a significant concern in the management of these chemical substances. The other options speak to outcomes that do not directly align with the realities of improper pesticide storage.