Net Zero | Sustainability | Renewable Energy

Image result for water filter water dropsHow important is clean drinking and safe potable water for household use? 1/3 of the world’s population doesn’t have access to clean drinking water. The water used for cooking, cleaning and bathing must be safe, in addition to clean drinking water; as many diseases (especially in developing countries) are water-borne diseases; from bacteria, viruses, or other hazardous microorganisms in unclean water. In fact, over 10% of the world’s population doesn’t even have access to clean, sanitary potable water for any type of household use. Meanwhile, over 70% of the earth is covered in water.

Image result for water filter water drops1(a). The most immediate way to aid the world water crisis is to provide filters to people who lack clean water, primarily to the 3rd world and low-income people of the world. This takes relief funds, and relief organizations, both established by governments and by private charities. There are many promising and emerging water purification technologies, such as LifeStraw, just as one example. "LifeStraw technology was originally introduced in 2005 as an emergency response tool to filter water..." - (lifestraw). More water purification technologies/ water filters are described here. Established, commercial, widely available filter technologies range from activated charcoal (or other carbon-based materials), to new water filtration nanotechnologies (micro-filtration), to reverse osmosis, to ultra-filtration (similar to micro-filtration, ultra-filtration purifies water as it passes through a semi-permeable membrane). Micro-filtration uses materials such as nanocarbon or graphene, and metals like silver and titanium; which are made into microscopic filtration membranes; essentially screens made from nano-materials with microscopic filtration holes.

Image result for g2o graphene filterThere are a variety of very promising uses of nanomaterials (including nanocarbon filters, and graphene filters) in both fully developed and developing, newly designed micro-filters. Here's more media on water filtration (a video featuring water filtration using graphene filters, and a video on nanocarbon filters, and other nanomaterials for water purification)>>> (1) (2)

Here is an article on the use of graphene in water filters from World Economic Forum - (can-graphene-make-the-worlds-water-clean). Another great example of the use of graphene in micro-filter water systems comes from the company G2O:>>>

“G2O’s graphene filter technology addresses a $2Bn market and reducing energy costs by up to 97%. In addition to use in filter technologies, this company sees applications for its graphene technology in:

  • Environmental maritime applications in aquaculture and oil & gas production
  • Drain water and waste water management
  • Desalination of seawater”

1(b). Tied for the #1 way to aid the world water crisis is - to develop more water treatment (sewage water treatment, storm water, river/ stream/ lake water, industrial use water treatment) plants -


2. Improve and create new rainwater collection systems (such as the ones found in this link): (


3. Water reclamation systems (such as the ones found in this link): (


4. Develop more desalination plants...please see the desalination article on our website: and also desalination-quest-quench-worlds-thirst-water


Image result for desalination plants
desalination plant in Cape Town, South Africa

5. Improve water infrastructure (reservoirs, aqueducts, piping networks…)


6. Utilities (especially in 3rd world countries) to further develop the use of micro-payments (for clean water wells, renewable energy micro grid + water treatment facilities) via mobile/ smart phones (also great for remote rural solar electricity, in addition to clean water services)

Please also read: water desalination- clean water for a thirsty world


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  1. Please let us here at Green City Times know what you think in a comment; and we’ll try and answer any questions as well.

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    [Dan Braff is the founder of GCT –

    Daniel Braff]

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