I thought of writing this small write-up since it has been going in my mind for last two years. I’m trying to express that thought through the following document.
Across the world, there is a rapid increase in urban living and an ever greater understanding of the consequences of Global Climate Change. Cities are experiencing warmer weather, hotter summers and delayed winters. Even, we can expect much greater changes in the decades ahead.
The population is increasing day by day and with no specific control on the increasing population explosion, there is a fierce struggle for land and space. There is also an increase in the intake of food and water. So, all these factors lead to an increase in demand graph and supply chart seems to go down. This is a worrying fact for a city, which needs to survive this trouble times.
Hence, we need to find some sustainable approach to keep a balance. The approach should be in areas concerning water, land, food and the air we breathe. All these are the basics of human survival. Let us take the example of water. It’s not the simple expansion of irrigation. It had an ecological and social dimension as well and was the key to rural transformation. Providing a limited but assured quantity of water to all urban households irrespective of their landholding is the key for water conservation. Now, to serve such dispersed need, the systems required had to be entirely different – technologically and socially. The population of the world tripled in the 20th century and now the use of renewable resources have grown six fold. Within the next fifty years the World population will increase by 40%-50%. Now this population growth coupled with industrialization and urbanization will result in an increasing demand of water and will have serious consequences in the environment. Already there is more waste water generated and dispersed today than at any other time in the history of our planet: more than one out of six people lack access to safe drinking water, namely 1.1 billion people, and more than two out of six lack adequate sanitation, namely 2.6 billion people.
(Estimation for 2002, by the WHO/UNICEF JMP, 2004) One must know that these figures represent only people with very poor conditions. In reality, these figures should be much higher.
Less availability of water leads to water stress. Water stress results from an imbalance between water use and water resources. The water stress indicator in this map measures the proportion of water withdrawal with respect to total renewable resources. The depleting resource leads to many tensions over neighbors, communities, districts, states and countries. So, it is a real fact that there is a water crisis today. “But the crisis is not about having too little water to satisfy our needs. It is a crisis of managing water so badly that billions of people – and the environment – suffer badly.” World Water Vision Report
With this current state of affairs, correcting measures still can be taken to avoid the crisis to be worsening. There is an increasing awareness that our freshwater resources are limited and need to be protected both in terms of quantity and quality. This water challenge affects not only the water community, but also decision-makers and every human being. “Water is everybody’s business” was one the key messages of the 2nd World Water Forum. Indian Cities are no different.
Another challenging factor, which haunts an Indian city, is Green Cover.
As per the report of National Institute of Environmental Studies, Bangalore has a Green Cover of 8.60 per cent, National Capital Region (New Delhi): 8.49 per cent, Greater Mumbai: 6.20 per cent, Chennai: 7.50 percent. The most astonishing fact is that Kolkata has a very less Green cover of 0.95 per cent. The numbers indicate percentage of green cover as a proportion of the total area for major Indian cities. Needless to say, the list — prepared by the Delhi-based National Institute of Environment Studies (NIES), who had made it clear that Calcutta has the lowest green count among all the cities.
It’s stated that as per the established norms the green cover should be at least 15 percent for mega-cities for a population of one – million. Lack of open space and greenery increases air pollution and triggers respiratory and other problems, besides raising temperature, affecting biodiversity and causing psychosomatic disorders among citizens. According to the report it also states that the Green Cover of the city has continuously been depleting from 1.3 per cent in 1997-98 to 0.95 per cent in 1999-2000, due to indiscriminate felling of trees due to various reasons.
Hence, it is very clear that most Indian Cities faces many environmental challenges. Hence a variety of methods will be needed to tackle climate change and its consequences and that living roofs and walls can play a significant role in tackling the situation. The greening of a roof can support rare and interesting types of plant, which in turn can host or provide suitable habitat for a variety of rare and interesting invertebrates.
These would serve many purposes:
a) Help to reduce global warming and green house gas effect
b) Help to reduce urban heat island effect (UHIE)
c) Help to reduce energy and carbon-dioxide emissions
d) Help to enhance bio-diversity, reduce flood risk, provide insulation and improve the appearance of the city.
Creation of Green Bus Shelters will not only increase the green cover. The mission would be to increase the green look of the city as well as educate the public about the many environmental benefits of green roofs, as well as improve urban air quality and provide attractive waiting spaces for public transit users. The Green Bus Shelters will serve the following purposes:
a) Filtering air pollution and particulates from vehicle exhaust
b) Managing storm water by slowing the runoff rate
c) Adding an extra layer of insulation to roofs
d) Providing wildlife habitat opportunities in a dense urban area.
The next concept is Rain water harvesting and creation of Rain Homes. This will together create a Sustainable Rain Neighbourhoods. A sustainable neighbourhood is a mixed used area with a feeling of community. It is a place where people want to live and work, now and in the future. Sustainable neighbourhoods meet the diverse needs of existing and future residents, are sensitive to their environment, and contribute to a high quality of life. They are safe and inclusive, well planned, built and run, and offer equality of opportunity and good services to all. (Bristol Accord, 6-7 December 2005)
Sustainable Rain Neighbourhoods will make the communities have access to round the clock usage of water, irrespective of the number of people through effective capturing, storing and usage of Rain water.
Wastes and its disposal is another problem which haunts a metropolitan city. Human is behind every developmental sector. The large-scale production and improper disposal of waste has become a source of pollution and further accumulation of garbage has resulted in serious deterioration of quality of life and the ecological balance. An initiative need to be taken on the need of systemic waste management. We need to have good projects all around the globe to address these issues and plan its mitigation policies. It’s then we can move towards a Safer World for us as well as for the future generations.
For any project to be successful, there is a need to create lot of awareness campaigns. The purpose of the campaign would be to help everyone learn how to make the city a better place to live, in both small and big ways.
Hope through these write-up, International Agencies, Government and Non-Government organizations take up these projects so that we can see a Greener and a Safer World.
Thanks a lot for reading. Please put a comment if your time permits.
Thanks and Regards,
Assistant Director (Disaster Management) in India’s Industry and Business organization at New Delhi
Specialist in Disaster Management and Environmental Sciences