blue carbon


Organic carbon, called blue carbon, is CO2 captured off the ocean coast, mostly through seagrass beds, marshes and mangroves.

These ecosystems, made up of plants, which, through the photosynthesis carried out, incorporate CO2, with the carbon being sedimented under them, contribute significantly to the reduction, and consequent mitigation, of CO2 in the atmosphere. The aforementioned plants are extremely efficient in retaining this component (even more efficient than terrestrial forests), preventing the CO2 from returning to its cycle - which would return it to the atmosphere and contribute to the greenhouse effect.

The mentioned coastal systems develop on the coast, in regions characterized by high population density, contributing to their degradation, affecting their contribution to sustainable decarbonization and consequently in the fight against global warming. Furthermore, another consequence of the destruction of these ecosystems is the release of CO2 that was held there, making these places a source of atmospheric contamination.

Portugal, being a coastal country has excellent conditions to develop these ecosystems, however, “the signals offered at national level, namely in terms of the Roadmap for Carbon Neutrality 2050, do not seem to us to have reflected the potential weight this important theme for national environmental policy and, as well, that which could be the respective long-term contribution to the achievement of political goals and objectives at the European Union level for the period 2021 to 2030.”< /p>

Sources:

 

Macredie, P.I., Anton, A., Raven, J.A. et al. The future of Blue Carbon science. 2019
Filipe de Vasconcelos Freitas, 2021. The Blue Carbon.


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