**6. Conclusion**

The presence of microplastics in the environment first and foremost generates environmental health hazards, which need to be increasingly identified and assessed. Most of the research in the field of environmental pollution from microplastics has been carried out on aquatic ecosystems. There then arises the need to initiate research programs on terrestrial ecosystems.

The future of MPs in the environment represents real research challenges. Indeed, there is a lack of knowledge at the local and national level of the different flows. At the global level, the toxicological reference values have not yet been obtained. Human dose–response relationships need to be investigated on the basis of still possible animal species exposures.

The field of environmental assessment of MPs, in the Caribbean for example, a priori calls for transdisciplinary approaches. Indeed, this region of the world, thanks to its tropical climate and the Caribbean Sea, makes tourism one of its main development niches. Pollution from plastic waste exposes its economy to a risk of economic imbalance. In the case of Haiti, beyond the urgent need to review its public policies in terms of urban water and solid waste management, the pollution of ecosystems by MPs highlights the need to initiate real research work. in the field of marine ecotoxicology.
