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In this
paper, a brief review on the sources of green energy and their sustainable in
global as well as in Indian context has been presented. It shows that green
energy is a basic requirement of human being but their further development and
proper use is needed otherwise it may be lapsed in few decades. There are
various sources of green energy have been discussed but some them are going to
die or we say not in frequent use. To save them and develop efficiently there
are many polices have been made at national and international.
Keywords: Green
energy, Biofuels, Fossil fuels
INTRODUCTION
In the recent scenario, there is a need of an
alternative energy resource for which green energy is most suitable alternative
around the globe. Green energy (sometimes
called renewable or sustainable energy)
is derived from regenerative resources of energy and do not reduce over period
of time. Green energy focuses on the atmosphere cleaning by reduction of CO2
emission and generates improved public
health. It generates from resources
which are natural like water, biomass, sunlight, landfill gas and wind [1]. Resources
of green energy are very environmentally
friendly as compare to the other type of energy resources which are not
responsible to global warming or change in climate. Recently, green energy is
the future, it generates naturally and supply continuously without any major
negative collision to the atmosphere and it leads to save the future of our
planet.
According to the report REN21's (2017) found
that about 19.3% renewable contributed to worldwide energy utilization by the
humans and in 2015-2016 production of electricity is 24.5%. The rate of energy
utilization is divided
The
united states and china are highly marketing in wind, solar and biofuels and in
hydro portions [4] due to this around 7.7 million
jobs are generated in the field of solar photovoltaic development [5] at the
end of the 2015 around half of the total electricity is generated which was
renewable [6]. In some countries the employment rate is decreases
like in Spain and Germany [7]. On the basis of GSR 2012 report the
estimate job distribution is in the field of green energy is shown in Figure 2 and about 30% jobs are
possible in this sector which is the highest among the others.
Green energy is widely spread in all over the
green (natural) world which helps in climate change mitigation, energy
preservation and economic benefits [9].
HISTORY OF DEVELOPMENT
The chronological evidences show that the
coal is the first source of green energy than the energy of biomass was
introduced in 19th century and then next was wind energy. When moving into the
historical records of the green energy and it found that main (traditional)
resources of green power were power of animal, human, water, fire, wind [10]
and biomass. Fossil fuel was introduced in 1860’s and 70’s which was very
beneficial then photovoltanic effect in solid state was found in 1885 [11]. In
1905 Max Weber focused on the fossil fuel energy in his paragraph “Die
protestantische Ethik und der Geist des Kapitalismus” (bis der letzte Zentner
fossilen Brennstoffs verglüht ist). At the end of the World War 1 solar engines
were introduced. The significance of solar power was noticed in the article
“Scientific American” in 1911 [12]. In 1960’s green revolution was noticed in
extension of agriculture. In 1970’s green energy was highly promoted especially
solar power but in 1980 the cost of solar panels were so high [13]. IEA 2014
focused on world energy outlook on green power supplies will be 1,700 GW to
4,550 GW from 2014 to 2040 [14].
RESOURCES OF GREEN ENERGY
There are various resources of green energy
some of them are described here in brief. These resources are natural and
environment friendly so it is safe for human being as well as to our planet.
Biofuels
A fuel derived from living sources (matter),
biological processes and anaerobic digestion. It is directly produced through
plants and domestic wastes. In this process contemporary CO2
fixation is occurred by the photosynthesis process of plant and microalgae. The
main advantage of biofuel is availability. This is very helpful in controlling
air pollution. Biofuels produce Biodiesel that is a type of diesel fuel produced by
recycled eatery lubricants animal fats or vegetable oils. It is bio decomposable. The pure form of Biodiesel is B100 and other common forms
are B2, B5 and B20 (in which 2%, 5% and 20%
biodiesel) are found.
Biomass and bioenergy
Living organisms’ biological material is
biomass. In 2016, USA gathered the 5% energy from biomass in which biofuels
from 48% and 41% from wood based biomass [15]. Biomass Energy Center [16]
reported that at present wood biomass is the largest source of green energy.
Bioenergy is also a green or renewable energy derived from living sources. It
generated from the area of forests or agriculture, organic wastes and municipal
wastes [17]. Tester [18] said that the availability is the main advantage of
biomass production means living organisms are found everywhere. There are many
types of energy produced from biomass for example chemical feedstock, cooking
heat, electricity, etc. [19-21].
Hydropower
The energy released from water is called
hydropower. In this, through watermills kinetic energy of water, changes into
mechanical energy or hydroelectricity. In 2016, 1064 GW or 16.4% of global
electricity is generated from hydropower.
Geothermal energy
Heat that is stored inside the earth is help
in producing geothermal energy. At present 10,000 MW over the world geothermal
energy is produced. Geographical survey reported that in India have observed
existence of about 340 warm springs inside the hot nations.
Solar energy
The energy produces by sun light is called
solar energy. China is a leading solar power generator in world with 100 GW
installed capacity. In India the highest energy producer is western Rajasthan
region and lowest is the north-eastern region. India indicated a good level of
getting the solar power [3]. The installed capacity of India is 23 GW of 30
June, 2018 and may be extended up to eight times in future.
Wind energy
The power which generate through the high
speed of wind is called wind power. Large numbers of wind turbines are
installed at field and their mechanical energy converted into electrical
energy. In 2016, 500,000 MW wind energy produced over the world.
GREEN ENERGY IN INDIA
Indian Government has also taken many
initiatives to increase the growth and development in green energy sector. The
database from Ministry of Renewal Energy in Indian is shown in Figure 3.
ENVIRONMENTAL SUSTAINABILITY
Environmental sustainability and social
development are the most important aspect of increasing living standards and
the growth of economy. The pollution, biological damages, heavy waste,
population growth cause climate change and green energy is also affected by
these reasons. The poor energy services make worse social issues like-
unemployment, poverty, inequity and ill health (diseases) so for controlling
this firstly we conserve our natural resources, greenery of the earth and use
different management techniques - Clean development mechanism, Green
Nanotechnology, Green chemistry, Green Economy, Green Technology and
Architecture and supports plantation, Energy Conservation, Energy Recycling,
Power, Energy Engineering, Environmental Engineering, Energy Storage,
Conversion and Grid Modernization, Bioremediation, afforestation. Environmental
sustainability is mandatory to live a healthy and standard life.
Sustainable Development aims to address all
the environmental, economic and socio-political problems, without compromising
either one another and without jeopardizing human capability and development.
It can be seen in Figure 4.
According to United Nations (UN) sustainable development submit held in New
York on September 25-27, 2015, eight goals which were previously decided and
also achieved. These are as follows:
1. To
eradicate extreme poverty and hunger
2. To
achieve universal primary education
3. To
promote gender equality
4. To
reduce child mortality
5. To
improve maternal health
6. To
combat HIV/AIDS, malaria, and other diseases
7. To
ensure environmental sustainability
8. To
develop a global partnership for development
Further, seventeen goals are needed to
maintain environmental sustainability which are shown in Figure 5 and also described here one by one. The new Sustainable
Development Goals (SDG) targets will be reviewed in 2030 when that will expire
as stated below.
1. End
poverty in all its forms everywhere.
2. End
hunger, achieve food security and improved nutrition and promote sustainable
agriculture.
3. Ensure
healthy lives and promote well-being for all at all ages.
4. Ensure
inclusive and equitable quality education and promote lifelong learning opportunities
for all.
5. Achieve
gender equality and empower all women and girls.
6. Ensure
availability and sustainable management of water and sanitation for all.
7. Ensure
access to affordable, reliable, sustainable and modern energy for all.
8. Promote
sustained, inclusive and sustainable economic growth, full and productive
employment and decent work for all.
9. Build
resilient infrastructure, promote inclusive and sustainable industrialization
and foster innovation.
10. Reduce
inequality within and among countries.
11. Make
cities and human settlements inclusive, safe, resilient and sustainable.
12. Ensure
sustainable consumption and production patterns.
13. Take
urgent action to combat climate change and its impacts.
14. Conserve
and sustainably use the oceans, seas and marine resources for sustainable
development.
15. Protect,
restore and promote sustainable use of terrestrial ecosystems, sustainably
manage forests, combat desertification and halt and reverse land degradation
and halt biodiversity loss.
16. Promote
peaceful and inclusive societies for sustainable development, provide access to
justice for all and build effective, accountable and inclusive institutions at
all levels.
17. Strengthen
the means of implementation and revitalize the global partnership for
sustainable development.
CURRENT ENERGY POLICIES IN INDIA
The Electricity Act 2003, National
Electricity Policy 2005, National Rural Electrification Policies 2006, Tariff
Policy 2006, Integrated Energy Policy Report (Planning Commission) 2006. These
policies suggest that the green energy path in all over the country up to 2031-2032.
These policies focus and special emphasis on the development of the green
energy.
RECENT INITIATIVES IN INDIA
Akshay Urja Shops or renewable (green) energy
shops, District Advisory Committees (DACs), Energy parks, Rajiv Gandhi, Akshay
Urja Newsletter (Renewable Energy Newsletter), Akshay Urja Diwas (Rajiv Gandhi
Renewable Energy Day) Green (Renewable) Energy Clubs etc. take initiatives for
development and preserve our green energy.
CONCLUSION
From this chapter, we can conclude the
following:
·
Green energy is the recent energy
alternative which can be for long which is safe and environmental friendly.
·
In India as well as in world,
advancement in green energy resources is on priority.
·
The level of the production of green
energy is continuously increasing.
·
Indian Government takes many initiatives
and make polices for the green energy production and development.
·
At last, we can say that for environment
sustainability, green energy is a key of success which should be utilized in
properly.
ACKNOWLEDGEMENT
Authors are thankful to all researchers and
for their valuable reports also which we have cited in this chapter. We are
also grateful Dr. Asha Singh, Government PG College, Fatehabad, Agra to give an
invitation for chapter contribution in her valuable book on Environment and
Climate Change.
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