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Across

2. the number of infant deaths for every 1,000 live births
5. emigration of highly trained or qualified people from a particular country
7. physical material that humans need and value such as land, air, and water
12. the act of coming to live permanently in a foreign country
15. to greatly reduce the number of people living in a city, region, etc
16. the concentration of human populations into discrete areas
20. the number of live births per thousand of population per year.
23. the number of years a person can expect to live
24. all the inhabitants of a particular place
27. the condition of one who is capable of working, actively seeking work, but unable to find any work
29. a measure of the number of dependents aged zero to 14 and over the age of 65, compared with the total population aged 15 to 64
32. the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
33. sources that will run out or will not be replenished in our lifetimes—or even in many, many lifetimes
35. the presence in or introduction into the environment of a substance which has harmful or poisonous effects
36. the total number of people who are currently employed plus the number of people who are unemployed and seeking employment
37. the number of children born alive to women of that age during the year as a proportion of the average annual population of women of the same age
38. development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Down

1. the action of moving to a new place and establishing one's home or business there
3. the difference between the number of births and the number of deaths recorded over a period
4. The way in which people are spread across a given area
6. prevention of wasteful use of a resource.
8. lacking the skills, abilities, or qualities that are necessary to get or keep a job
9. an agreement between an employer and an employee that the employee will provide certain services
10. the act of leaving one's own country to settle permanently in another
11. a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants
13. the department within a business that is responsible for all things worker-related
14. the condition in which people in a labor force are employed at less than full-time or regular jobs or at jobs inadequate with respect to their training or economic needs
17. an energy source that cannot be depleted and are able to supply a continuous source of clean energy
18. gradual changes in all the interconnected weather elements on our planet over approximately 30 years
19. he system of public works of a country, state, or region
21. the number of immigrants minus the number of emigrants, including citizens and noncitizens, for the five-year period
22. an event constituting a new stage in a changing situation
25. the state of having reliable access to a sufficient quantity of affordable, nutritious food.
26. the concentration of individuals within a species in a specific geographic locale
28. the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms
30. the total process of collecting, compiling, evaluating, analysing and publishing or otherwise disseminating demographic, economic and social data pertaining, at a specified time, to all persons in a country or in a well delimited part of a country.
31. the ratio of deaths to the population of a specific area or during a specific period of time
34. the surroundings or conditions in which a person, animal, or plant lives or operates.