Last week, a compelling lecture on environmental management in livable cities took place during the annual meeting of the Science and Technology Association. Dr. Li Wei, the executive director of the China Ecological Association, delivered an insightful and practical session that left the audience both informed and inspired. Her presentation emphasized the importance of sustainable urban planning and everyday actions that can significantly contribute to environmental protection.
One of the key points she highlighted was the issue of dust accumulation in homes. Many residents reported that their windows were often covered in dust, and when the wind blew, it easily entered the rooms, posing a risk to respiratory health. To address this, Dr. Li suggested that people should clean their windows at least once a week. This simple habit, she explained, could make a noticeable difference in indoor air quality.
She also spoke about the proper maintenance of green spaces. "The grass in parks and lawns should not be cut too short," she said. "Keeping it slightly longer helps it trap more dust and improves its ability to retain moisture." In many cities, however, lawns are often mowed very short, which not only reduces their effectiveness as natural dust collectors but also increases water evaporation, leading to unnecessary water waste.
Another concern she raised was the way green belts along city roads are managed. "In many places, the green areas are higher than the road surface, and they're separated by curbs," she explained. "This setup prevents rainwater from properly soaking into the soil, reducing the ability of the green spaces to absorb water and filter pollutants." She argued that raising the level of the road slightly and lowering the green belts would allow for better water infiltration and improved air quality.
Dr. Li also mentioned the use of permeable materials in parking lots. "Instead of using concrete or asphalt, gravel paving can help cool the area and reduce dust," she added. These small changes, she said, can have a big impact on making cities more livable and environmentally friendly.
Overall, her talk served as a reminder that even small, everyday actions—like cleaning windows, maintaining grass height, and rethinking urban design—can play a vital role in creating healthier, more sustainable living environments.
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