They store honey to get them through the winter (or in the tropics, to get through the season when not many flowers are in bloom). I suspect humans might have first foraged on the remnants of hives broken up by honey badgers after most of the bees had left. Once humans had fire, hives could be smoked out.
Apparently, the Africanized bees are cold and moisture sensitive. If the winter is too cold AND there’s too much annual rainfall, they don’t spread. Here is a US Department of the Interior article, which also notes that the Africanized bees are somewhat more resistant to a certain bee parasite than European honeybees.
I live in Texas, and I’m allergic to bee stings, so I have an interest in this subject. I take care to leave bees alone, and I don’t question them about their ancestry.
Didn’t occur because it was solved via a massive effort of elbow grease on the part of programmers.
Largely corrected by laws limiting the use of particular gasses. Though you will note that Australians still have an incidence rate of melanoma ~2.5 times as Americans.
http://ozonewatch.gsfc.nasa.gov/ (A sharp increase in the size of the ozone hole between 1979 and 1983 is made to plateau)
http://www.coolibar.com/australian-experience.html
http://cco.iftydev.pcsnap.com/cms/one.aspx?pageId=9522
Was a fringe theory that never had large scientific support.
Is not a fringe theory and has massive scientific support.
No idea.
Is an ongoing problem that is being researched.
Nutters.
Being researched in case it actually turns into an issue.
While panic might not be necessary for any of these things, many of them are real issues and didn’t disappear because they were never real, but rather because people researched it, found a solution, and implemented it. Unfortunately, failures and epidemics sell newspapers, success stories by-and-large are uninteresting to the layperson and hence go unpublished unless you actually Google it yourself.
Here is the Wikipedia article on Africanized bees