【2.21早间】塑料污染形势严峻，如何减轻?地球负担？
Question1:
Representatives from 150 nations are meeting with the goal of dramatically reducing or ______ all plastic pollution by 2040.
A.eliminating
B.imitating
答案：
A选项正确。A选项eliminate的意思是“清除”，听力中提到：“来自全国150个国家的代表与会，商讨如何在2040年之前，达成大量减少或清除所有的塑料污染的目标”，B选项imitate的意思是“模仿”，与原文不符合。
Question2:
According to the expert, the second suggestion is to control the categories of the chemicals used in the producing of plastics.
A.True.
B.False.
答案：
A选项正确。听力原文中提到：“Another thing they can do is regulate the kinds of chemicals that are going into plastic. That could make it safer to produce, and also safer to recycle fewer toxins in the air.”，由此可知，专家给出的第二个建议就是管控投入塑料制品制造的化学物质种类，以达到生产过程的安全与环保。
今日单词：
dramatically adv. 突然地
address v. 应付
regulate v. 管理
今日短语：
kick off （事件、比赛或讨论等）开始
put a cap on 遏制
课外加餐：
可降解塑料的降解原理
降解塑料是指一类其制品的各项性能可满足使用要求，在保存期内性能不变，而使用后在自然环境条件下能降解成对环境无害的物质的塑料。现有光降解型塑料、生物降解型塑料等多种新型塑料。
环境降解塑料的降解过程主要涉及生物降解、光降解和化学降解。这三种主要降解过程相互间具有增效、协同和连贯作用。
聚合物的降解是指因化学和物理因素引起的聚合大分子链断裂的过程。聚合物暴露于氧、水、射线、化学品、污染物质、昆虫等动物以及微生物等环境条件下的大分子链断裂的降解过程被称为“环境降解”。降解使聚合物分子量下降，聚合物材料物性降低，直到聚合物材料丧失可使用性，这种现象也被称为聚合物材料的“老化降解”。
逐句精听
Every minute, an entire garbage truck worth of plastic waste is dumped into the world's oceans.That's according to the United Nations' environment program.
每分钟，就有一整辆垃圾车的塑料垃圾被倾倒进世界海洋。这是根据联合国环境计划得出的结论。
This week, the first ever global plastic pollution negotiations kicked off in Uruguay. Representatives from 150 nations are meeting with the goal of dramatically reducing or eliminating all plastic pollution by 2040.
本周，首个全球塑料污染谈判在乌拉圭启动。来自150个国家的代表正在开会，目标是到2040年大幅度减少或消除所有塑料污染。
One thing is that they can set a global cap on plastic production, since a lot of people say you need to address it at the source.
一件事是他们可以对塑料生产设置全球上限，因为很多人说你需要从源头上解决这个问题。
Another thing they can do is regulate the kinds of chemicals that are going into plastic. That could make it safer to produce and also safer to recycle, fewer toxins in the air.
他们能做的另一件事是控制塑料中的化学物质种类。这可以使其生产更安全，回收也更安全，空气中的毒素更少。
And then there are different kinds of things they can do. Once you're done with plastic, actually recycling it, or at least limiting the flows into the oceans, which are a really major problem, and one that's getting worse.
他们可以做很多不同的事情。一旦你用完塑料，就可以回收它，或者至少限制流入海洋的塑料，这是一个非常严重的问题，而且这个问题正在变得越来越严重。
