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BW agents are affected by a number of weather conditions.
1. Sunlight. The sun’s ultraviolet light helps kill many biological agents.
2. Wind. Winds will spread the biological agents and may contribute to diluting their effectiveness.
3. Temperature. BW agents vary in their sensitivity to extremes of heat and cold. However, most are resistant to freezing.
4. Desiccation. Depending on the degree of desiccation, biological agents may either suffer growth inhibition or be killed.