Browse Sustainability Matters Daily’s published articles from newest to oldest. This archive is the chronological route through the site; the topic guide is better when you want a curated starting point.
Explore the main subjects
- Start with the Water hub for filtration, reverse osmosis, softening and household water quality.
- Use the Sustainable Products hub for durability, materials, labels and buying decisions.
- Read the Sustainable Eating guide for food choices, waste and certification.
- Explore what makes a sustainable city for transport, buildings, nature and resilience.
- Learn to test environmental claims with our greenwashing examples.
Recent and legacy reporting
The archive includes current practical guides as well as older culture, education and travel pieces that remain useful to readers. Dates and context matter: follow current official guidance for safety, regulation, tests and fast-changing technology.
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All articles
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Hydrogen Water: How It Is Made and What Evidence Says
Hydrogen water is drinking water containing dissolved molecular hydrogen gas, written H₂. It is not the same as hydrogen peroxide, acidic water or ordinary water described with vague hydrogen-rich marketing. Commercial devices usually make it by electrolysis, while some tablets generate hydrogen through a controlled reaction. The health evidence is still preliminary, and homemade electrical…
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Hydroponics for Beginners: A Practical Home Guide
Hydroponics grows plants with roots supplied by water, oxygen and dissolved nutrients rather than garden soil. A small home system can produce herbs and leafy greens in limited space, but it still needs light, monitoring and regular cleaning. For a first project, keep the design simple. Start with one easy crop and a modest reservoir…
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Environmental Impact of the Art Industry: Sources and Solutions
The environmental impact of art does not come from one material or activity. It spans artist studios, pigments and solvents, exhibition construction, climate-controlled buildings, packaging, international freight and travel. The largest source differs between a local community studio and an international gallery. That means the useful question is not whether art is wasteful. It is…
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Reverse Osmosis vs Distilled Water
Compare reverse osmosis and distilled water by contaminant removal, energy, water use, maintenance, and the best fit for your home.
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What Size Water Softener Does a Family of Four Need?
A family of four cannot choose a water softener from household size alone. The correct size depends on measured hardness, daily water use, peak flow, iron or manganese, desired regeneration interval and the unit’s certified capacity at the programmed salt dose. As a rough illustration, four people using 60 US gallons each per day with…
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Water Softener Maintenance: A Practical Guide
Use this water-softener maintenance schedule to check salt, prevent bridging, test performance, clean safely, and reduce waste.
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5 Water Softening Methods Explained—and What They Actually Remove
Ion exchange is the standard household method for removing calcium and magnesium hardness, but it is not the only process that can reduce hardness. Lime softening, nanofiltration or reverse osmosis, distillation and specialised deionisation can also reduce hardness in the right setting. Devices that only change scale formation are conditioners, not true softeners. Choosing a…
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What Is the pH of Reverse Osmosis Water?
Reverse-osmosis water is often mildly acidic, but it has no fixed pH. Learn why readings vary, how to test correctly and when to troubleshoot.
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Eco-Friendly Yoga Mats: Materials and Buying Guide
The most eco-friendly yoga mat is usually the one that is safe for its intended use, durable enough to keep for years and supported by specific material and manufacturing information. No material is impact-free, and labels such as natural, non-toxic or biodegradable do not tell the whole story. Choose grip, cushioning and durability first. Then…
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How Airlines Are Reducing Their Carbon Footprints
Airlines are cutting emissions through newer aircraft, fuller flights, operational efficiency and a gradual shift towards lower-carbon fuels. These measures matter, but aviation demand and limited fuel supply mean that efficiency gains alone do not make flying climate-neutral. The useful way to assess an airline’s climate claim is to ask what changed, how much it…
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Benefits of Living Near Nature: What Evidence Shows
Living near parks, woodland, coast or other accessible natural space can support mental well-being, physical activity, social connection and relief from heat and noise. The benefits are real but not automatic: safety, accessibility, housing quality, transport and the condition of the environment all matter. The original version of this article drew on time spent at…
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Xiaomi Mi Air Purifier Review: What Still Holds Up
This is a retrospective review of an early Xiaomi Mi Air Purifier bought second-hand and used in a heavily polluted city. The original owner test found that it reduced the displayed fine-particle reading from roughly 51–53 to 2 over about four hours, with a separate consumer monitor showing a similar result. That experience remains useful,…