8万只气球去哪儿了|趣科普

Group 1 - The event commemorated the 80th anniversary of the victory in the Chinese People's Anti-Japanese War and the World Anti-Fascist War, featuring the release of 80,000 balloons and doves [1] - The balloons used in the event are made from fully biodegradable natural materials, differing significantly from conventional balloons [1] - The materials used include natural latex, plant starch, and polylactic acid (PLA) derived from fermented plants like corn and sugarcane, which are environmentally friendly and harmless [1] Group 2 - The development team faced challenges in maintaining the required gas impermeability, tensile strength, and elongation while using new biodegradable materials [2] - After extensive testing, the team successfully achieved a high degradation rate while ensuring excellent physical properties of the balloons [2] - The balloons can start to decompose within a month under normal sunlight conditions, with a degradation rate of 60%-70% within 180 days, and complete degradation within 1 to 1.5 years, resulting in water, carbon dioxide, and organic matter [2]