Gateway B1 Unit 9: Test !free!

To ensure success on the Gateway B1 Unit 9 test, students should be able to:

Scientists at a Swedish university have created a new type of battery made from wood. Yes, wood! This “wood battery” uses a material called lignin, which comes from trees. If they develop this technology further, we will have cheaper and more environmentally friendly energy storage. Unlike traditional batteries, which contain toxic chemicals, the wood battery is recyclable. However, if the researchers don’t solve the problem of low energy density, the battery won’t replace lithium-ion batteries in smartphones. But for large-scale energy storage (e.g., for wind farms), this is a major breakthrough. gateway b1 unit 9 test

Complete with when, as soon as, until, before : To ensure success on the Gateway B1 Unit