For the past few months this blog has analysed various
geoengineering processes, including both SRM and CDR. This blog-post aims to discuss
your thoughts and poll results, with a combination of academic literature, to
assess people’s feelings on geoengineering. I also wish to assess the COP21 agreement
in reference to keep global temperatures lower than the 2oC threshold.
Uncertainty of geoengineering processes
The impacts that may be induced by geoengineering are
unknown, leading to high levels of uncertainty for most people (
Corner et al 2013).
Geoengineering is expected to
decrease global temperatures and carbon dioxide levels, however, most processes
have been experimented at only a laboratory scale or a small scale (as
mentioned in previous blogs).
Although,
climate change models are used to predict impacts of geoengineering processes,
it is hard to ensure that these processes will perform exactly as
expected.
Computational models tend to be
unable to take into account all factors that may influence the atmosphere
during geoengineering, as it is too complicated to process (
Davies 2010).
Hence, creating a concern as to how geongineering
may influence the environment and the water cycle.
Furthermore, people feel insecure to use geoengineering, as
it may cause unexpected negative impacts, and there is no ‘undo button’.
Geoengineering processes may not work as
expected and a malfunction may suddenly release large amounts of carbon dioxide
in the atmosphere, at an alarmingly fast rate (
Virgoe 2009).
Figure 1 highlights that a failure in
geoengineering could increase temperatures 20 times faster than current rates
of increased temperature (
Bala 2009).
If
this occurs, the impacts may be irreversible, leading to a large degradation of
the atmosphere.
People may not have
enough time to adapt against sudden plumes of carbon dioxide, causing health
hazards.
Therefore, making people more sceptical
to undertake geoengineering processes.
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Figure 1: Implementation of SRM geoengineering and the failure scenario
Source: Baum et al 2013 |
Ethical and Moral Issues
A great concern occurs when regarding moral and ethical
issues.
People fear that with
adaptations of geoengineering methods, nations may assume that they do not have
to mitigate their CO2 levels in the atmosphere (
Davies 2010).
This may occur as geoengineering may be
comprehended as a ‘quick fix’ and people may think that a sufficient solution
has been found, creating a disincentive to further decrease fossil fuel
emissions and increase renewable energy (
Davies 2010).
Moreover, people may feel they do not need to be responsible
for their actions, as scientists with improved technology, will always find a
solution to problems they inflict on Earth (
Davies 2010).
Therefore, encouraging people to not think of
any negative influences induced on the environment, by their actions.
This behaviour may increase species extinction
rates and negatively influence ecosystems (
Bala 2009).
People are the main cause of climate change impacts.
Since the industrial revolution people have
been increasing carbon dioxide levels in the atmosphere, leading to high temperatures
and an increase in green house gases (
Corner and Pidgeon 2010).
Therefore, Corner and Pidgeon (
2010) suggest,
since people play an important factor in negatively influencing the Earth, they
should not try to ‘artificially fix’ the Earth through geoengineering, as they
are likely to create further problems.
Governance
Additionally, some geoengineering processes may have impacts
at a global scale.
Therefore, questions arise
regarding what organisation, nation or person should decide if geoengineering
should be implemented and which type of geoengineering processes should be
applied to reduce carbon dioxide levels.
Some countries may not want geoengineering to take place.
However due to global scale impacts, they may
have no choice since other countries may be determined to promote this process
(
The Royal Society 2009).
Moreover, if
all nations benefit from geoengineering, a question evolves to who should pay
for the implementation (
The Royal Society 2009).
Some nations argue that the developed
countries should pay, as they are economically stable and have contributed
greatly in increasing global carbon dioxide levels.
Controversially it is argued that developing
countries are also using fossil fuels to a great degree and are also emitting
carbon dioxide emissions, thus they should also pay for the installation of
geoengineering. However, developing countries may be unable to do so, as they
are not economically stable (
The Royal Society 2009).
Poll Results
When looking at both polls (Figure 2), it is evident that most
votes are similar to the beliefs found in academic literature.
At present, there are 13 votes for SRM
methods and 16 votes for CDR methods.
Although the number of votes may not be large enough to draw academic
conclusions, it can be compared to academic papers.
The results draw the conclusion that a high
proportion of people feel that no geoengineering methods should be implemented,
as they are unsafe and risky towards people and the environment.
This is highlighted, as it is the most
popular selected option, with 46% of SRM votes and 37% of CDR votes.
In the case of SRM methods two other options,
both gained 23% of the votes, these were white roofs; and green and PV roofs.
These options are considered soft
geoengineering methods, as the technology used is simple and more natural,
hence people may feel content that side effects may not drastically impact the
Earth like other SRM methods (
Corner et al 2013).
This observation is also seen in CDR methods
as Enhanced Weathering and Afforestation/Reforestation both gained 19% of the
votes.
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(a) |
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(b)
Figure 2: SRM and CDR Poll Results |
However, to my surprise, when regarding CDR methods, Carbon
Dioxide Capture also gained 25% of votes, even though it can be perceived as a technologically
advanced method.
By looking at people’s comments
on previous blog-posts, it can be deduced that this process, implementing
Carbon Dioxide Capture, may be more effective than other processes with
minimal environmental impacts.
Therefore, people may be more comfortable to use this process, even
though it is costly and requires large amounts of water.
Furthermore, it is evident through the polls people are more content using CDR
methods rather than SRM methods (
Corner et al 2013).
This may be because most CDR methods are an
enhancement of natural processes to reduce
CO2, whereas SRM uses mechanical
ways to change global temperatures.
Furthermore,
the main aim of SRM is to increase sun reflection to reduce global temperatures
and does not reduce
CO2 levels, which is the main reason climate change impacts
are occurring (
Davies 2010).
Nevertheless,
this is controversial as the immediately feasible and most researched
geoengineering methods are SRM methods rather than CDR methods (
Brogan 2015)
COP21 Agreement
The recent United Nations Framework Convention on Climate
Change (COP21) took place in Paris in December.
The nations that participated agreed that global temperatures should
only increase by a maximum of 2
oC, with a main aim to only reach a
1.5
oC increase in average global temperatures when compared to pre-industrial
levels (
UNFCCC 2015).
A very ambitious
aim that gives false hope of a solution to mitigate climate change impacts (
Bawden 2016).
However, this aim is very hard to
achieve, as it requires fast rates of
CO2 reduction, which are highly unlikely
to be achieved by 2030 by cutting fossil fuels (
Bawden 2016).
Many scientists feel that renewable energy is
not technologically advanced to reduce climate change impacts to the desired degree
(
Upton 2015).
Hence, for the COP21 agreement
to be successful, it is likely that geoengineering methods will have to be applied.
It can also be argued that the COP21
agreement indirectly suggests the implementation of geoengineering, as it
requests the safe use of carbon sinks (see previous
blogs) and suggests sufficient
technological advancement should be implemented to mitigate climate
change impacts (
UNFCCC 2015).
The
positive aspect of the COP21, is the agreement to have no negative impacts
inflicted on ecosystems, the environment, people and food security (
UNFCCC 2015).
Many scientists feel that actions against climate change
need to be taken now, to avoid catastrophic impacts (
Bawden 2016). The COP21
agreement was fundamental in emphasising that actions needed to be taken
immediately (
UNFCCC 2015).
Hence, many scientists
are against geoengineering but feel that this process needs to be implemented,
as it may be the only solution to delay climate change impacts (
Upton 2015).
Scientists believe there has not been a
substantial change when trying to mitigate climate change impacts through
renewable energy and a reduction of fossil fuels.
They also feel, geoengineering should be a
temporary solution until renewable energy develops further and replaces fossil
fuels (
Upton 2015).
Conclusion
Overall, people feel that geoengineering is a process of
high uncertainty and many unpredicted negative impacts may take place. However, climate change impacts are becoming
more apparent and global temperatures are increasing. Although geoengineering is not the ideal
solution, I feel that it could delay climate change impacts allowing renewable
energy to advance to an efficient level where fossil fuels are not needed. I believe that some geoengineering processes
may be more beneficial than others; and with an increase of research and
technological advancement, some processes may have limited or no impacts on
ecosystems, the hydrological cycle or food security. I believe we are at a stage that geoengineering
may have to be a temporary solution to delay further increases of global temperatures. I personally, will feel more reassured if nations
implement geoengineering processes that will be further researched and have
minimal impacts. I look forward to hearing
your thoughts on the matter.