Further increase in this proportion is expected, putting enormous pressure on pension and health-care systems, and slowing economic growth. The flow of people from poor and war-torn countries and continents to nearby developed ones (for example, from Africa and the Middle East to Europe) is rising.

The tension this creates will grow as populations in poor countries rise, and while the economic disparities between sending and receiving countries remain large. In most developed countries and in a growing number of Asian and Latin American nations, women are having fewer than two children each — the level needed for long-term population stability.

Not only are they extensive, they are fast and complete.

You can enable and disable individual sync features according to your own requirements.

It contains everything described in this article, and more.

If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.

Keep reading to see what's new in Version 1705 (Build 8201.xxxx). Visit the Office Insider community instead, where our app teams post regularly about "Fast first" features.

By far the largest increase is projected in sub-Saharan Africa with a quadrupling of population — from just shy of 1 billion currently to 3.9 billion. The median age of populations is rising, especially in the developed world, as a consequence of lower birth rates and rising lifespans.

Europe and Japan now host the highest proportion of people aged over 65.