2.2 Discovering Useful Structures（重点练）-2020-2021学年高一英语十分钟同步课堂专练（人教版2019必修第二册）

重点练 I. 阅读选择 Rainbow-coloured rubbish is the colourful waste created by a Swedish city with an unusual recycling(回收利用） system. Like many cities in Sweden , Eskilstuna has an excellent recycling record . It met the EU's 2020 target of recycling 50% of waste many years ago. Almost everyone who lives here follows strict recycling rules at home. People are expected to sort their household waste into seven separate categories, including food, textiles, cartons and metal. But what really makes the system stand out is the bright colour code. The reason for this becomes clear at the city's recycling plant. The bags arrive all mixed up because they're collected altogether, once two weeks from outside people's houses. But thanks to those bright colours, scanners can choose the bags and separate them without difficulty. The food waste in green bags is processed on site into mud to make biogas, which powers the city's buses. One of the benefits of this method of recycling is that there is less cro