1. Disturbance of Natural Ecosystem: The construction of a walkway around the lake can disturb the natural ecosystem of the lake, including the plants, animals and microorganisms living in the lake and its surrounding areas. 2. Unnecessary Energy Consumption: Construction of the walkway requires energy for material production, construction, and transportation. Depending on the materials used, it can also require high levels of energy to construct the walkway. 3. Increased Stormwater Runoff: The walkway can increase the amount of stormwater runoff entering the lake, increasing water levels and potential flooding. 4. Increased Pollution: Construction of the walkway can result in an increase of dust, sediment and chemical pollution entering the lake from the surrounding areas. 5. Altered Hydrology: The construction of a walkway around the lake can alter the natural flow of water, leading to decreased habitat quality for species living in or near the lake.