The question asks about the advantage of using an energy efficiency label in Green Technology practices.

20. The question asks about the advantage of using an energy efficiency label in Green Technology practices. A. Higher quality and durability are not direct benefits of the label itself. B. The label promotes energy efficiency, not necessarily the increased use of alternative energy sources. C. Energy efficiency labels help consumers choose appliances that consume less energy, thereby enhancing energy saving*. This is a core principle of Green Technology. D. An increased carbon footprint is the opposite of what Green Technology aims for. Therefore, the main advantage is enhanced energy saving. C. Penjimatan sumber tenaga dapat dipertingkatkan 21. The characteristics given are: Generated from waste materials. Supply is not constant. Let's evaluate the options: A. Biojisim* (Biomass) is generated from organic waste (e.g., agricultural waste, municipal solid waste) and its supply can be variable. This matches both characteristics. B. Tenaga nuclear* (Nuclear energy) is not generated from waste materials in this context and has a constant supply. C. Tenaga suria* (Solar energy) is not generated from waste materials, but its supply is not constant. D. Bahan api fosil* (Fossil fuels) are not generated from waste materials and have a relatively constant supply (until depletion). A. Biojisim 22. The question asks which socio-scientific issue is directly related to the release of carbon dioxide gas by vehicles. A. Tanah runtuh* (Landslides) are geological events, not directly caused by CO2 emissions. B. Kesan rumah hijau* (Greenhouse effect) is caused by the accumulation of greenhouse gases, including carbon dioxide, in the atmosphere. Vehicle emissions are a major source of CO2, directly contributing to this effect. C. Gempa bumi* (Earthquakes) are geological events. D. Penipisan lapisan ozon* (Ozone layer depletion) is primarily caused by chlorofluorocarbons (CFCs) and other ozone-depleting substances, not carbon dioxide. B. Kesan rumah hijau 23. Rajah 5 shows a person spraying something, likely pesticides or herbicides in an agricultural setting. The question states that excessive use of this activity can harm the environment and asks for an effective Green Technology application to address this issue. A. Penggunaan baja kompos* (Use of compost fertilizer) is a Green Technology for soil fertility, but it doesn't directly address the issue of spraying for pest/disease control. B. Penggunaan racun perosak organik* (Use of organic pesticides) is a better alternative to synthetic pesticides, but it still involves spraying. C. Mendapatkan khidmat nasihat daripada pakar* (Obtaining expert advice) is a good practice but not a specific Green Technology application. D. Menjalankan penyelidikan untuk mendapatkan baka tanaman yang tahan penyakit* (Conducting research to obtain disease-resistant crop varieties) is a fundamental Green Technology approach. By developing crops that are naturally resistant to pests and diseases, the need for spraying harmful chemicals is significantly reduced or eliminated, making it a highly effective and sustainable solution to the environmental problem caused by excessive spraying. D. Menjalankan penyelidikan untuk mendapatkan baka tanaman yang tahan penyakit Last free one today — make it count tomorrow, or type /upgrade for unlimited.