| Disaster | Exportation | Deterioration | |||
An unintended, catastrophic event triggers human migration | The willful destruction of the environment renders it unfit for human habitation | An incremental deterioration of the environment compels migration as constraints to human survival increase | ||||
Sub-Category | Natural | Technological | Development | Ecocide | Pollution | Depletion |
Origin | Natural | Anthropogenic | Anthropogenic | Anthropogenic | Anthropogenic | Anthropogenic |
Intention of Migration | Unintentional | Unintentional | Intentional | Intentional | Unintentional | Unintentional |
Duration | Acute | Acute | Acute | Acute | Gradual | Gradual |
General Example | Volcano | Meltdown | Dam Building | Defoliation | Global Warming | Deforestation |
Real-World Example | Montserrat | US-TMI | China – 3G | Vietnam | Bangladesh | Ecuador-Amazon |
Estimated Number Displaced | 7000 | 144,000 | 1.3 million | 7 Million* | 15 million | 115,000 |