[mpg33]

Is it? We already have people living in very cold conditions and very hot conditions today...we have insulated housing/air conditioning/clothing...what's going to big the difference 30 years from now?

A lot of alarmism if you ask me.

[XR0CSWV3h3kZWg]

Local tempature variation is just one of the threats. If you want a fairly serious organization's take on what the major threats are here is the DoD:

) Persistently recurring conditions such as flooding, drought, and higher temperatures

) More frequent and/or more severe extreme weather events

) Sea level rise and temperature changes

) Decreases in Arctic ice cover, type, and thickness

http://archive.defense.gov/pubs/150724-congressional-report-...

One thing that short 2015 report does not cover is reduction in crop yields that frequently lead to conflict.

[Retra]

People need food. Food doesn't grow well in very hot and very cold conditions, nor in very wet or very dry conditions. And most other animals don't survive well outside the environment they evolved to live in.

[hyperdunc]

Less food, fewer people. More space for those who remain - until adaptation leads to another population increase.

[EpicEng]

Sure Spock, but most of us aren't ok with mass famine and death.

[cctt23]

And that’s totally how it works, less food is produced, so people just say, “Oh well, time to die.” They don’t become desperate, they don’t migrate en masse, and they don’t go to war, it’s just a peaceful loss of a few billion lives to make more room for you. All of that assuming we’re not swimming in technological miracles like some others here are saying. Fusion is right around the corner! We’re going to grow cows in test tubes for free!

No wonder we’re screwed.