The phrase "areas has left" is not correct in written English.
It appears to be a grammatical error, likely due to subject-verb agreement issues.
Example: "The areas have left a significant impact on the community."
Alternatives: "regions have departed" or "zones have exited".
But I think also because the direness of economic conditions in these areas have left people more open to different economic models.
Recent gains by the government in suburbs north of the city, backed by a punishing campaign of barrel-bombings against residential areas, have left the rebel-held portion of the city in danger of being encircled.
Yet even the 'degraded' ecosystem they knew is no more, as trawling and technological improvements, as well as political decisions to open up closed areas have left fish nowhere to hide.
Specifically, most young people in the rural areas had left their homes in order to support their families, and only children and older people tended to be at home.
الخبر باللغة العربية Sana'a, 22 September, 2014 – With days of fighting in the capital city, families in the most affected areas have left in droves, but even those in the least affected areas are still unnerved.
Looting, which continues to be a problem throughout the Maya area, has left it structurally compromised.
The dramatic reversal of progress in this area has left campaigners despondent, because in the first decade of the 21st century many felt there was a genuine prospect of eliminating rough sleeping entirely.
In fact, in an act of generosity to those who insist on earning their turns, the area has left a patch of untouched terrain below the bottom of the Zuma chairlift.
Subsequent demolition of all housing and infrastructure in the area has left a blank canvas of land stretching along the Avon River corridor from the CBD to the sea.
