Sixty-seven nations signed the High Seas Treaty on Wednesday, which aims to protect the oceans, tackle environmental degradation, combat climate change and prevent biodiversity loss.

Negotiations concluded in March and the agreement was adopted by the UN in June. It is seen as crucial to achieving the target of having 30% of the planet’s land and oceans protected by 2030 – a target commonly known as ’30 by 30′.

Despite nearly 70 signatures at the UN General Assembly, the treaty must be ratified by at least 60 countries – at the national level – in order to enter into force.

“By signing the High Seas Treaty, we can protect the oceans from human pressures and move closer to our goal of protecting at least 30% of the planet by 2030,” said Environment Commissioner Virginios Sinkevičius.

The interim head of Greenpeace International Mands Christensen spoke of a “purely symbolic moment”. “Now politicians must bring the treaty home and ensure it is ratified in record time,” he stressed.