| In villages where the population density is relatively low, he hopes observers would also manage to check whether voters' lists are rigged. |
| The real surprise is that in terms of total population and population density Los Angeles is remarkably similar to both New York and London. |
| However, when locust population density is high, they form into gregariously behaving bands of nymphs or swarms of adults. |
| Other triggers for encystment include decreasing temperatures, high population density and low light. |
| The low population density in rural areas makes the provision of specialized mental health services in those areas impractical. |
| In post-industrial economies population density is further intensified, with ever more immigrants flowing into cities. |
