I know there's a lot of problems, but I don't think the many civilizations of mankind are at risk. Humans are far more adaptable now, than they have ever been in the history of mankind.
Steve_American wrote:There are a lot of experts who think it is possible that grain harvests will fail worldwide, so we will not be able to feed everyone. And civilization is impossible without grain harvests.
Please provide a source for this claim. What is "a lot"?
I know a lot of scientists who say that we can feed 10 billion on earth before we'll start to run out of food. As someone already mentioned, the population of the earth may recede with shortages, but disappear? THAT is simply unbelievable.
Steve_American wrote:And civilization is impossible without grain harvests.
Not every civilization relies on this, but it would certainly impact some societies more than others. Saying it is impossible, is unrealistic, to say the least. Humans adapt.
There are food sources, like insects, that do not rely on "grain", like cattle, do. We'd certainly need to alter our diet, accordingly.
Why would ALL the grain harvests fail? That seems just as unlikely as the other claims you are making. Do you have a source to support this claim? I certainly couldn't find anything to support a global grain crop failure.
“Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.” ― Ralph Waldo Emerson