Included was a warning: drought and crop failures could trigger major population movements and lead to political instability.

NPR: U.S. Report Links Climate Change to Security

Health officials point out that Pakistan and neighbouring Afghanistan repeatedly re-infect one another due to significant population movements between the countries.

BBC: Polio killings a major setback

Labour MP Margaret Hodge, chairwoman of the cross-party public accounts committee, said there was the potential for "sudden and unmanageable population movements" between inner and outer London and potential housing shortfalls were "deeply worrying".

BBC: Block of flats

Today, no country is in the old sense far away when the consequences of regional instability and terrorism - and then also climate change, poverty, mass population movements and even organised crime - reverberate quickly round the globe.

BBC: In full: Brown security statement

Central to this plan is a call for further research into the sharks' population structure and migratory movements, and how ecotourist activities might affect their behaviour.

ECONOMIST: Whale sharks

Citing unprecedented movements of the population to areas with heavy concentrations of armaments manufacturing and responding to the administration's orders, the Census Bureau unveiled a 1941 plan to conduct an annual sample census.

CNN: Why the huge interest in the 1940 Census?

It is well known that partial culling creates an upsurge of disease due to perturbation of infected badgers, in other words increasing the movements of infection among the population by the badgers scarpering to neighbouring sets, potentially setting up a new geographically infected area.

BBC: Viewpoints: The badger cull

Indo-Guyanese, who make up 48% of the population, feel targeted, and plan their movements carefully.

ECONOMIST: The fear of racial violence