03

المتكلمون

• Speaker 1 0:04
• Speaker 2 1:10

1. 0:04

   الفصل 1: How is everybody today? 66s · Speaker 1

   How is everybody today? Let's begin because we've got a lot to cover. Today we are going to look at the problem of air pollution. And to understand air pollution, I want to look at one of the particularly harmful gases that causes it. So, t…

2. 1:10

   الفصل 2: And of this 6 billion, almost 50 % live in cities. 300s · Speaker 2

   And of this 6 billion, almost 50 % live in cities. Another way to say that is more than 3 billion people, 3 billion, live in cities. Why am I telling you these numbers? Let me explain why. It is important to understand these urban populatio…

3. 6:11

   الفصل 3: You have a pretty good idea of how terribly it affects every living thing. 196s · Speaker 1

   You have a pretty good idea of how terribly it affects every living thing. So, let's... Turn our attention to what's being done about this problem. Let's turn our focus to one unique solution Let's talk about trees trees provide both enviro…