What is one characteristic of Class A foams?

Class A foams are specifically designed for use with ordinary combustible materials, such as wood or paper. One of their key characteristics is that they are biodegradable, which means they decompose naturally in the environment and do not contribute to long-term pollution. This property is significant because it allows for more environmentally friendly firefighting tactics, aligning with modern approaches to safety and ecological responsibility.

In addition to being biodegradable, Class A foams effectively reduce the surface tension of water, allowing it to penetrate burning materials more effectively. Other characteristics of Class A foams may include their ability to cool and suffocate fires, but the emphasis on biodegradability distinguishes them in terms of environmental impact.