1
2
Subject (ZB):
“...greenhouse gas...”
3
4
5
6
7
8
9
10
11
12
Subject (ZB):
“...greenhouse effect...”
13
14
Subject (ZB):
“...greenhouse effect...”
15
Subject (ZB):
“...greenhouse gas...”
16
Subject (ZB):
“...greenhouse effect...”
17
18
Subject (ZB):
“...greenhouse effect...”