<span>parts of Europe are very polluted because they have a very high population density</span>
I'm 99% sure the answer you're looking for is increased pollution.
<u>Answer</u>:
Globalisation makes the world shrink and flatten it in all sectors.
<u>Explanation</u>:
In the ancient and medival world, only labours were allowed to travel between the countries. IT revolution paves its way for the jobs to be exchanged between the countries and it leads to service growth in the developing countries.
After social media's tremendous growth, information gets transferred easily through various social media platforms. Knowledge and technology transfer between the countries generates more employment even in the under developed areas. India gained a generous amount of software and BPO jobs from the developed countries to increase their GDP since 1990s.
<span>age groups in a given population.</span>
