Clean and Green Cities Around the World


Excess use of resources led by industrialization and population growth is leading to an unprecedented demand for energy. Higher the number of people using even higher number of services leads to higher energy demand. Climate change is a slow phenomenon, sometimes so slow that we tend to overlook the fact that it is an irreversible phenomenon. However, climate change is very much real. For example, this month the CO2 concentration level crossed crucial 400ppm mark,it was 393ppm during Copenhagen Climate Change conference in 2009. As the CO2 concentration is building up triggering erratic climate behavior,more and more cities are recognizing this danger and working towards eco friendly solutions. Here are some of the most popular:

1)       Reykjavik, Iceland: Recently, Reykjavik has been in the news because of its hydrogen buses. That’s right, buses which are run completely on hydrogen. This might just be the most eco friendly mode of public transport yet. All of Reykjavik’s electricity comes from entirely renewable resources, just like the rest of Iceland.

2)       Portland, Oregon, United States:Portland , the argri city has avastlygreen cover – about 92 thousand acres. The city also takes stringent and way above average measures to ensure that it remains one of the most eco friendly cities in the world. Its strong public transport and great natural trails makes it one of the most sought after city at least in terms of clean air.

3)       Kritianstad, Sweden: City essentially uses no imported oil, gas or coal for heating homes or businesses. City generated enough biogas from agri waste, lanfills and sewage treatment plants to fulfill all needs locally.

Living in the city of Mumbai, breathing clean air or seeing many green trees seems like it is unachievable or impossible. Considering Mumbai’s waste disposal problem (Deonar, Mumbai’s dumping ground accepts more than 4000 tonnes of waste everyday and it is just a 132 hectare plot) you would think that looking at an energy source with its core in recycling would seem like a logical option.

Mumbai, or should we say India should accept its responsibility towards future generations and aim towards a more sustainable disposal of waste. Pollution reigns in the city, in spite of a thriving public transport system. City generates enough wastes to generate CNG from biogas system that, if implemented can greatly reduce the stress that Mumbai’s environment is under. Considering the raw material for Biogas (lots of degradable waste) is handy, it is an option whichneeds immediate attentionand immplementation.

However, there are a few concerns while using a source such as Biogas. When biogas is producedfrom waste, 3 gases are obtained. Methane, which is a desirable gas and hydrogen sulphide as well as carbon dioxide.The presence of carbon dioxide and hydrogen sulphide, reduce the efficiency and efficacy.of the system and hence need to be removed before biogas can be used methane. But on the brighter side, carbon dioxide when clean can be sold to beverage industry and hydrogen sulphide can be reduced to sulfur, an industrial raw material.

In a new inventive discovery, Carbon Clean Solutions have invented a technique which is known as “MethPure”. As the name may suggest, this technique works in purifying the biogas (methane+ hydrogen sulphide+ carbon dioxide) into purely methane (referred to as BioCNG). This is carried out in a manner which does not require an investment which is too heavy neither does it reduce the amount of methane content in the BioCNG.

The pure methane can now be used for vehicular transport, a concept already implemented in many European cities.

If a technology like MethPure is adopted widespread by cities like Mumbai and then the country in general, the impact on the environment will be considerable and will result in solving huge problem of handling & recycling city waste. The fact that BioCNG can be used for vehicular transport will majorly reduce the dependence of the average Indian population on non-renewable sources such as petrol and diesel. The ability to rely almost completely on renewable energy resources will make the country free from pollution, greener, healthier and happier


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