Plastic trash is a big problemproblem/ˈprɒb.ləm/L1问题；难题something that is difficult to fix or understand for our worldworld/wɜːld/L1世界；地球the Earth with all its countries, seas, and people. It does not go away easily, so scientistsscientists/ˈsaɪən.tɪsts/L1科学家people who learn about the world by doing tests and studies want to find a way to use it.
Scientists in China found a new way. They use a special tool made of two metals, cobalt and nickel. This tool helps break down the plastic and turn it into fuelfuel/ˈfjuː.əl/L1燃料（如汽油、木头）something we use to make heat or power, like wood, gas, or oil for airplanes. The new way works well and is not too hot for big factories to use.
This new idea is a big help for our worldworld/wɜːld/L1世界；地球the Earth with all its countries, seas, and people because it makes less bad gas than old ways. It is also cheap to use. Many people think this is a great step. We can clean up plastic trashtrash/træʃ/L1垃圾，废物things we throw away because we do not need them anymore and make fuelfuel/ˈfjuː.əl/L1燃料（如汽油、木头）something we use to make heat or power, like wood, gas, or oil at the same time!
