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By Mario Osava
NITERÓI, Brazil, Jan 9 2026 (IPS)
“We moved from a context of socio-environmental exclusion to one of environmental justice,” said Dionê Castro, coordinator of the Sustainable Oceanic Region Program which led Brazil’s largest nature-based solutions project.
Having won national and global awards, the Orla Piratininga Park (POP) built 35,000 square meters of filtering gardens and improved the water quality of the Piratininga lagoon, in the oceanic south of Niterói, a municipality in metropolitan Rio de Janeiro, across the Guanabara Bay.
The project, named after the late Brazilian environmentalist Alfredo Sirkis, began in 2020, and aims to environmentally restore an area of 680,000 square meters on the lagoon’s shores whose waters cover an area of 2.87 square kilometers.
At the heart of the project are the treatment systems for the waters of the Cafubá, Arrozal, and Jacaré rivers, which flow into the lagoon. Sedimentation and pollution were deteriorating the water resource and the quality of life in the surrounding area.
A weir, which receives the river flow, a sedimentation pond, which removes solid waste, and the filtering gardens make up the chain that partially cleans the water before releasing it into the lagoon, reducing environmental impacts, in a process called phytoremediation.
The gardens are small reservoirs where aquatic plants called macrophytes are planted, which feed on the nutrients from the pollution, explained Heloisa Osanai, the biologist specialized in environmental management of the Sustainable Oceanic Region Program (PRO Sustainable).
Three polluted water treatment stations are in the neighborhoods crossed by the rivers, based on natural resources, “without the use of electrical energy, chemicals, or concrete,” explained Castro, the coordinator of PRO Sustainable.
Furthermore, some macrophytes produce abundant flowers. Only native Brazilian species are planted, with priority given to biodiversity, added Osanai.
Along with these water treatment systems, 10.8 kilometers of bike paths, 17 recreation centers, a 2,800-square-meter Eco-Cultural Center, and other environmental works with social goals were built.
The bike path, generally along a pedestrian sidewalk, caters to physical and leisure activities but is also a factor in protecting the lagoon shoreline by blocking urban occupation and real estate invasions, explain the officials.
The area where the water system was built at the mouth of the Cafubá river was highly degraded by an open-air dump and flooding. A reformed “belt channel,” in some sections also reinforced by macrophyte islands, corrected the waterlogging.
On the other side of the lagoon, 3.2 kilometers of bioswales improve the drainage of rainwater. They are trenches with pipes, stones, and other materials, plus vegetation, that accelerate drainage and prevent pollutants from reaching the lagoon.
The main result, according to Castro, reconciled the local population with the lagoon. The old houses that “turned their backs on the lagoon” are joined by new buildings facing the water, some with balconies overlooking the new landscape, said Mariah Bessa, the engineer in charge of hydraulic aspects of the project.
The local population was highly involved in the design and construction of the new environmental and social facilities that transformed the lagoon shoreline. This led to new attitudes, such as not littering on the ground or in the water and preventing others from doing so, according to Castro.
The Ecocultural Center promotes permanent environmental education, with films, children’s games, audiovisual resources, and a large space for visits and classes.
“We moved from a context of socio-environmental exclusion to one of environmental justice,” said the coordinator of PRO Sustainable.
Credit: WMO/Daniel Pavlinovic / UN News
By Center for International Environmental Law
WASHINGTON, USA, Jan 9 2026 (IPS)
The Trump Administration’s sweeping executive order to withdraw the United States from dozens of United Nations bodies and international organizations, as well as a treaty ratified by the United States with the advice and consent of the US Senate, is a targeted assault on multilateralism, international law, and global institutions critical to safeguarding human rights, peace, and climate justice.
This move, the constitutionality and legal effect of which are questionable, was announced under the guise of protecting US interests, but does exactly the opposite. By divesting from global cooperation on the environment, human rights, democracy, and peace, the US puts its own future, and that of the planet, at greater risk.
The Executive Order represents a deliberate effort to dismantle the international infrastructure designed to uphold dignity, protect children, improve gender and racial equality, advance sustainable development, preserve the oceans, and confront the climate crisis. It undermines bodies that safeguard the global commons and ensure basic protections for marginalized people and those in vulnerable situations around the world, including refugees, women, children, people of African descent, and many others.
Rebecca Brown, President and CEO of the Center for International Environmental Law (CIEL) said:
“This executive order is not just a policy shift— it is a direct assault on the multilateral system that has helped prevent conflict, advance human rights, and protect the global commons for nearly eighty years. At a time when rising seas, record heat, and deadly disasters demand urgent, coordinated action, the US government is choosing to retreat.”
“The decision to defund and withdraw from the UN Framework Convention on Climate Change (UNFCCC) does not absolve the US of its legal obligations to prevent climate change and remedy climate harm, as the world’s highest court made clear last year. This action is simply a continuation of this Administration’s efforts to prioritize corporate interests over people and planet, and flout the rule of law.
Withdrawing from institutions designed to support global climate action does not change the stark reality of the climate crisis, rebut the irrefutable evidence of its causes, or eliminate the US’s clear responsibility for its consequences. Withdrawal only serves to further isolate the US to the detriment of its own population and billions around the world.”
IPS UN Bureau
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