00:01
Which of these is not a reason why the signing and enforcement of the montreal protocol was relatively easy? we have a few statements here.
00:09
Statement a is substitutes, statement b, the us and the eu.
00:13
C, who was making cfcs, and d, scientific evidence.
00:17
First of what is the montreal protocol? so there's this class of chemicals called cfcs, and they were used in refrigeration.
00:32
So they're chloroflorocarbons, which just means that they have carbon atoms with chlorine and chlorine, all in the same molecule.
00:39
So they were predominantly refrigerants, but it was discovered that actually they were depleting the ozone layer very rapidly.
00:47
So there was international cooperation to get together and phased them out.
00:53
And that was the montreal protocol.
00:55
And it was really, really successful.
00:58
The ozone layer has really recovered from this.
01:02
So, let's have a look at some of these.
01:04
First of all, d, the evidence was clear.
01:06
This is a reason that helped sign.
01:09
It was very clear.
01:10
So this is true and it helps.
01:16
Production concentrated in a few firms also true and helped.
01:20
So if statement, and it helped it get signed.
01:22
Because these firms did not want to be known as contributing to ozone depletion.
01:28
So they were very motivated to cooperate and switch away to avoid hurting their image...