INTRODUCTION

"River to sea without litter " (RMSL) is an initiative of the Portuguese Environment Agency with the ultimate objective of reducing the amount of waste that ends up in the sea, through the concerted actions of the various entities interested in the fight against marine litter and willing to contribute consistently to this purpose.

The initiative of the Portuguese Environment Agency "River to sea, without litter" (RMSL) aims to reduce the amount of waste that ends up in the sea, by means of concerted actions of the various entities interested in the fight against marine litter and willing to contribute in a coherent way to this design.

Marine litter is defined as any solid material which has been deliberately discarded or unintentionally lost on beaches, on shores or at sea. The definition covers materials transported into the marine environment from land by rivers, draining or sewage systems or winds. It includes any persistent, manufactured or processed solid material.

Marine litter originates from different land and sea sources and its typology is based on the predominant consumption patterns. Marine litter encompasses a wide range of materials including plastic, metal, wood, rubber, glass and paper, however, studies have shown that about 80% of the materials are plastic.

Marine litter has its origin in different sources and its typology is based on the prevailing patterns of consumption. Marine litter form part of a wide range of materials, including plastics, wood, metal, rubber, glass and paper, however, studies have shown that about 80% of the materials are plastic


Marine litter, and in particular the accumulation of plastic garbage, has been identified as one of the largest global problems of our times. Marine litter can be transported by currents of the oceans since its origin until long distances and can be found in all marine bays and even in remote areas such as the deserts islands in the middle of the ocean, or deep sea, literally, this pollution is present in all the oceanic ecosystems. Marine litter has a wide range of adverse impacts, both for the fauna and marine flora, as well as in terms of social, economic and health.

Marine litter through the Marine Strategy Framework Directive of the European Union, the declaration of the United Nations "Our Ocean, Our Future: Call to Action' and many other international initiatives has come to be recognized as a matter which requires urgent action.

Some sources mention that approximately 80% of the waste comes from the rivers. The component of debris that causes problems for marine ecosystems are those that are not biodegradable and continue to have a negative impact on the quality of the marine environment, many of these materials are plastic, but also they include glass and metal, although, with a smaller visual impact on the surface of the rivers, images of the sea bottom show that these heavier products accumulate.

The RMSL fits different types of actions since monitoring for the presence of waste in rivers, beaches and sea, the awareness of the problem among different audiences and the deepening of science and technology to combat the marine litter.

In operational terms, it intends to establish partnerships with different stakeholders on this issue, entities of central and local public administration, non-governmental organizations