----- Nội dung dịch tự động từ ảnh ----- TARK with a suitable word from the box to complete the passage replace produced heat also popular nations 1. Biogas is a form of biofuel produced from animal manure (phân), human waste and plant material. It is a renewable 2. energy source which can be used to (26) fossil fuels such as oil, coal and natural gas. 3. Nowadays, it can be used to power motor vehicles, generate electricity and (27) 4. Using biogas can (28) homes. help us reduce our carbon footprint. In addition, biogas has positive source of fuel for 5. health benefits for residents of rural areas. Traditionally, biogas is a (29) 6. households in developing (30) 7. biogas has been (31) 8. producer is Germany. VIII. Read the text and answer the questions PRALLE China is the largest producer of biogas in the world. In Europe, as an alternative fuel since the 1920s. The most significant biogas