Answer: The given statement is True.
Trees are important in maintaining the quality of air. They act like filter as they draw particles from the atmosphere ( such as dust particles that are trapped on the leaf surface).
By performing photosynthesis ( process of formation of food using carbon dioxide and water in presence of sunlight), they decrease the amount of CO2 ( carbon dioxide ) from atmosphere, which could otherwise have a harmful impact on the live forms.
Thus, the given statement is True.