<span>The phosphate enters the ecosystem and becomes tied up in the biogeochemical system where it is recycled. The rapid growth of aquatic vegetation and/or increase in the algal population can cause the death and decay of vegetation and aquatic life because of the decrease in dissolved oxygen levels.</span>
Answer:
The illegal migration has created socio-political and economic problems and lead to the growth of population in the southern states.
Explanation:
- Most of the migrants include individuals from north Africa and sub-Saharan regions that have migrated to the southern states of Europe like Spain and Italy. Many have come from Morocco, Algeria Tunisia, and other places.
- They have affected the population diversity of the country and permanently settled in France, Netherlands, Spain, Germany, and Belgium. Since 2000 illegal migrations have resulted in rising of conflict and poverty.
- Some positive effects of migration include the education and job aspects while the negative impacts can be seen as the growth of slums and asylums and child laborers. Their impact on resource usage and economic development has changed in many European cities.
