Kristen Tapping, a graduate from London South Bank University, has invented a bike wheel that she says can help clean pollution from the air. It's called Rolloe.
毕业于伦敦南岸大学的Kristen Tapping发明了一种自行车车轮，她说这种车轮可以清洁空气污染，称之为“Rolloe”。
The wheel uses fins to pull in air as it turns, It then uses filters to take in polluted air and give off clean air back into the environment. The wheel can filter more air if it goes faster, although it still works at low speeds.
车轮在转动时使用翅片吸入空气，然后使用过滤器过滤污染的空气，并将清洁的空气排放回环境中。如果速度更快，轮子可以过滤更多的空气，尽管它仍然在低速下工作。
Tapping said users would need to change the filter every week, or after about 250 kilometers, to make sure the wheel continues to work well. The wheel fits in the front of a standard bike and weighs about one kilogram.
Tapping表示，用户需要每周或大约250公里后更换过滤器，以确保车轮继续正常工作。这个轮子可以装在标准自行车的前部，重量约为一公斤。
Tapping said she was encouraged to create the wheel when she was biking around London." In traffic, you always notice the pollution; the heat, the gases and the smell,"she said. She predicts that if 10 percent of cyclists in London had a Rolloe on their bike, they could filter about 266,865 m³ of air a day, although this has yet to be tested.
塔平说，当她在伦敦骑自行车时，有人鼓励她制作这种车轮。她说：“在交通中，你总是会注意到污染；高温、气体和气味。”她预测，如果伦敦有10%的骑行者在自行车上安装了Rolloe，他们每天可以过滤约266865立方米的空气，尽管这尚未经过测试。
A recent report shows that London's health costs because of air pollution are the highest out of the 432 European cities. The World Health Organization(WHO) has also said that outdoor air pollution causes about 4.2 million deaths around the world each year.
最近的一份报告显示，在432个欧洲城市中，伦敦因空气污染造成的健康成本最高。世界卫生组织（WHO）也表示，室外空气污染每年导致全球约420万人死亡。
Tapping wants to use the wheel on shared bike projects at first, with the aim of making the wheels available for all bikes to use. She says she would also like to create a wheel that would fit in the back of a bike, as well as making them available in different sizes.
Tapping最初希望在共享单车项目中使用这种车轮，目的是让所有自行车都能使用这种车轮。她说，她还想创造一个适合自行车后部的车轮，并提供不同尺寸。
