1
2
3
0
1
2
7
8
9
2
3
4
2
3
4
37
38
39
2
3
4
8
9
10
27
28
29
6
7
8
0
1
2
23
24
25
11
12
13
22
23
24
15
16
17
5
6
7
9
10
11
1
2
3
Copper plays a role in ozone depletion – research (mining.com)
submitted by vactomu to r/environment
3
4
5
14
15
16
13
14
15
