Today in our environmental science lecture, we'll discuss the impact of urban green spaces. A recent study in Melbourne found that adding parks and community gardens can reduce local temperatures by up to 4 degrees Celsius during heatwaves. Interestingly, the cooling effect was strongest not near large trees, but around small, clustered shrubs and water features. The study also noted that residents living within 500 meters of such green areas reported a 20% decrease in stress levels. However, researchers warned that poorly maintained spaces could attract pests, so regular upkeep is essential. Now, what was the most surprising finding?