Adolescence /ˌæd

issue /ˈɪʃ.uː/ , /ˈɪs.juː/ noun [ C ] PRODUCT
6. a set of newspapers or magazines published at the same time or a single copy of a newspaper or magazine
There's an article on motorbikes in the latest/next issue.
An old issue of 'Homes and Gardens' lay on the table.
7. An issue of shares is when a company gives people the chance to buy part of it or gives extra shares to people who already own some.
Megacity


migrant /ˈmaɪ.grənt/ noun [ C ]
a person or animal that travels from one place to another
These birds are winter migrants from Scandinavia.
The cities are full of migrants looking for work.
migrant workers
a migrant population
obstacle /ˈɒb.stɪ.kl ̩/ /ˈɑːb-/ noun [ C ]
something that blocks you so that movement, going forward or action are prevented or made more difficult
The biggest obstacle in our way was a tree trunk in the road.
This decision has removed the last obstacle to the hostages' release.
overpopulated /ˌəʊ.vəˈpɒp.jʊ.leɪ.tɪd/ /ˌoʊ.vɚˈpɑː.pjə.leɪ.t ̬ɪd/ adjective
If a country or city, etc. is overpopulated, it has too many people for the amount of food, materials and space available there.
overpopulation /ˌəʊ.vəˌpɒp.jʊˈleɪ.ʃ ə n/ /ˌoʊ.vɚˌpɑː.pjə-/ noun [ U ]
Overpopulation is one of the country's most pressing social problems.
population /ˌpɒp.jʊˈleɪ.ʃ ə n/ /ˌpɑː.pjə-/ noun [ C + sing/pl verb ]
1. all the people living in a particular country, area or place
Ten per cent of the population lived in poverty.
In 1992 the population of Cairo was approximately 6 500 000.
a growing/shrinking population
Throughout the war, there were horrific casualties amongst the civilian populations of both countries.
The UN is investigating new methods of population control (=limiting the growth of the number of people).
The country is facing a population explosion (= sudden growth in the number of people) .
2. all the people or animals of a particular type or group who live in one country, area or place
There's been a 9% rise in the prison population (= the number of people in prison) .
The dolphin population has been decimated by tuna fishing.