Some of us are old enough to remember the acid rain scare back in the 70’s. The scientific consensus was that by now the forests of Scandinavia would be stone dead and the fjord’s have the consistency of brown windsor soup. It turned out to be a hoax.
As the Good Book says: ‘…there is no new thing under the sun.’ (Ecclesiastes, 1:9.) Today there is a slight difference in that the ‘great scare’ must threaten the entire population. It must be a problem mankind have never faced before. Most importantly it must have a plausible scientific rationale, yet be uncertain and ill-defined, which gives believers maximum scope for alarming speculation ( see a number of posts on this thread ).