What is the main idea of a passage about the impact of urban trees on city health?

What is the main idea of a passage about the impact of urban trees on city health?

• A. Urban trees significantly improve air quality and urban health, though benefits vary by context.
• B. Urban trees have no real impact on city health.
• C. The main issue is the cost of planting trees in cities.
• D. Trees in cities mainly cause allergy problems and traffic issues.

Answer: (A)

The main idea being tested is that urban trees bring real health and environmental benefits to a city, especially by improving air quality and overall urban health, while the extent of those benefits can vary depending on the context. Trees in cities filter pollution, help cool urban areas, and support residents’ well-being, but factors like climate, tree species, maintenance, and planting density influence how strong those benefits are. The other options tilt toward negating impact, focusing only on costs, or emphasizing negative side effects, which don’t capture the overall message that the benefits are real and significant, even if they aren’t the same everywhere.

The main idea being tested is that urban trees bring real health and environmental benefits to a city, especially by improving air quality and overall urban health, while the extent of those benefits can vary depending on the context. Trees in cities filter pollution, help cool urban areas, and support residents’ well-being, but factors like climate, tree species, maintenance, and planting density influence how strong those benefits are. The other options tilt toward negating impact, focusing only on costs, or emphasizing negative side effects, which don’t capture the overall message that the benefits are real and significant, even if they aren’t the same everywhere.