The pollution of water by intensive agriculture and livestock farming has a high health and environmental cost. This problem's solution is as complex as it is urgent. We must be able to provide food security for 8 billion people without damaging the environment. Water free of pollutants will indicate that we have achieved this.

The search for solutions to the pollution caused by mercury used in artisanal gold mining reveals how difficult it is to deal with a semi-clandestine activity widespread in many developing countries, often generating an informal economy. Mercury causes death and keeps more than one million people worldwide chronically and silently ill. Developing global ethics for the gold market is essential to end dumping and provide justice for miners.

A new project in Sierra Leone shows us the importance of ensuring water and sanitation in schools to reverse the impoverishment of neglected rural areas. Passing on to students the ability to manage the facilities turns them into educational agents in their communities, ensures sustainability, and gives them an empowered future.

COP15 on biodiversity has been the first in which the private sector has participated. It is a realistic and practical step forward that reverses the flow of pressure from citizens and companies to political power and promotes the understanding of natural capital as an irreplaceable value that must be preserved.

They have been our partners in evolution, and now they are under threat. Wetlands represent the subtle link between land and water, which is why they suffer the consequences of climate change, overexploitation, and pollution. They should be considered internationally as carbon sinks and crucial ecosystems for 40% of the world's biodiversity. They are the best sustainability advisors we have. 

International action to protect the seas has not yet begun. Although we understand its importance now more than ever, the recent Ocean Conference in New York has not resulted in any agreement beyond declarations of good intentions. Promoting and disseminating the idea of thinking about water, regardless of whether it is fresh or salty, is a necessary step to unblock the disastrous international standstill that is undermining all SDGs. 

Millions of households around the world need water from tanker trucks to live. Droughts, overexploitation, pollution, and lack of investment in infrastructure make this population grow by the day. It is an essential type of supply when all else fails, but it is often informal, unregulated, and without health guarantees. We must consider this so that this solution is fair for everyone and does not jeopardize the future of access to water. 

Urban runoff from heavy downpours releases a vast amount of water that is lost, pollutes, and causes flooding. Controlling this water that cannot flow through impermeable soil and taking advantage of its enormous potential is one of the keys to the regenerative city envisaged in SDG 11.