Climate
change: causes, outcomes in Pakistan and a way forward
Climate
change can generally be defined as a change in global or regional climate
patterns, in particular, a change apparent from the mid to late 20th century
onwards and attributed largely to the increased levels of atmospheric carbon
dioxide produced by the use of fossil fuels. The Framework Convention on
Climate Change (UNFCCC), in its Article 1, defines climate change as: “a change
of climate which is attributed directly or indirectly to human activity that
alters the composition of the global atmosphere and which is in addition to
natural climate variability observed over comparable time periods.” It has
caused drastic effects in the world climate such as the rise of carbon dioxide
level, global temperature, melting of ice sheets, the rise of sea levels, and
ocean acidification, etc. For this change a range of human activities are
responsible—as per NASA, 97 percent of climate scientists agree that
climate-warming trends over the past century are very likely due to human
activities—for instance, the rapid emission of carbon dioxide which has
resulted in global warming. Thus, we need a broad-based consensus at the
international level and a firm commitment at the national level to fight to
diminish the aftermath of climate change.
Human
activities are the major cause of climate change. As per NASA, 97 percent of
climate scientists agree that climate-warming trends over the past century are
very likely due to human activities. The foremost cause is the global warming.
The burning fossil fuels like coal and oil has increased the concentration of
carbon dioxide. Due to expansion of greenhouse effect, the global warming
rises. As per this phenomena, the gases such as water vapors, carbon dioxide,
methane, nitrous oxide, and chlorofluorocarbons in the our atmosphere prevents
the heat to leave the earth’s atmosphere, resultantly the ozone layer depletes
and the temperature rises.
Furthermore,
in its Fifth Assessment Report, the Intergovernmental Panel on Climate Change
(IPCC) concluded that there is a more than 95 percent probability that human
activities over the past 50 years have warmed our planet. The industrial
activities that our modern civilization depends upon have raised atmospheric
carbon dioxide levels from 280 parts per million to 400 parts per million in
the last 150 years. The panel also concluded there is a better than 95 percent
probability that human-produced greenhouse gases such as carbon dioxide,
methane and nitrous oxide have caused much of the observed increase in Earth's
temperatures over the past 50 years. In addition, about half of the CO2
emissions between 1750 and 2010 have occurred in the last 40 years.
Besides,
deforestation and increase in the use of chemicals in domestic and agriculture
life is also another reason of climate change. The deforestation is the second
leading cause of global warming and produces about 24% of global greenhouse gas
emissions. Scientist say that deforestation in tropical rainforests adds more
carbon dioxide to the atmosphere than the sum total of all the cars and trucks
on the world's roads. Furthermore, the surge in the uses of chemicals in
domestic as well as in agriculture, in the shape of fertilizers, also plays its
role in climate change. The high rate of application of nitrogen-rich
fertilizers has effects on the heat storage of cropland (nitrogen oxides have
300 times more heat-trapping capacity per unit of volume than carbon dioxide)
and the run-off of excess fertilizers creates 'dead zones' in our oceans. In
addition to these effects, high nitrate levels in groundwater due to over
fertilization are cause for concern for human health.
These
causes resulted in climate change and have perilous aftermath. In this regard
it is pertinent to mention some pieces of evidence globally which it has
produced. In this regard the Intergovernmental Panel on Climate Change (IPCC)
was created by the United Nations Environment Programme (UN Environment) and
the World Meteorological Organization (WMO) in 1988, now engages with 195
Member countries, which provides policymakers with regular scientific
assessments on climate change, its implications and potential future risks, as
well as to put forward adaptation and mitigation options.
Foremost hazardous
evidence is the rise of carbon dioxide in out atmosphere. As per NASA’s
scientific evidence, for a millennium the level of carbon dioxide (parts per
million) was below 300 which started to rise since 1950 and it is now above
400.
Secondly,
the rise of global temperature. As per NASA’s evidence the planet's average
surface temperature has risen about 1.62 degrees Fahrenheit (0.9 degrees
Celsius) since the late 19th century, a change driven largely by increased
carbon dioxide and other human-made emissions into the atmosphere. Most of the
warming occurred in the past 35 years, with the five warmest years on record
taking place since 2010. This is also establishes by the United Nations’ report
prepared by World Meteorological Organization on 22 September, 2019. It states
that the period “is currently estimated to be 1.1 degrees Celsius above
pre-industrial era of 1850-1900, and 0.2 degrees Celsius warmer than
2011-2015”.
Thirdly,
the oceans are getting warmer, and ice sheets are shrinking. As per NASA the
oceans have absorbed much of this increased heat, with the top 700 meters
(about 2,300 feet) of ocean showing warming of more than 0.4 degrees Fahrenheit
since 1969. Further, the Greenland and Antarctic ice sheets have decreased and lost
an average of 286 billion tons of ice per year between 1993 and 2016, while
Antarctica lost about 127 billion tons of ice per year during the same time
period. The rate of Antarctica ice mass loss has tripled in the last decade.
Fourthly,
the glaciers are melting and sea level is rising. Around the globe the glaciers
are retreating including in the Alps, Himalayas, Andes, Rockies, Alaska and
Africa. Moreover, the Global sea level rose about 8 inches in the last century.
The rate in the last two decades, however, is nearly double that of the last
century and is accelerating slightly every year.
In
addition, there are other drastic pieces of evidence of climate change. Arctic
sea ice is declining rapidly. The disturb rainfalls and extreme weather events
have increased. Also, the ocean acidification, which has increased by about 30
percent since the industrial revolution, is another evidence of climate change.
It also has a negative impact on crop yield productions. The direct impact on
the lives of humans is on the vulnerable and marginalized segment of society.
Moreover,
as per IPCC Fifth Assessment Report, numerous risks are involved which urged
reasons for concern. These include risk of death, injuries, health or disturbed
livelihoods due to storms, flooding and sea-level rise. Moreover, the risk in
water supply, the supply of electricity and emergency situations are also
there. The foremost risk is food insecurity due to droughts, flooding, and
precipitation variability. The risk to lose marine and coastal ecosystems,
biodiversity as well.
Although Pakistan is not much contributing in
global warming and climate change, yet it is 7th most effective country from
it. Global Change Impact Studies Centre of Pakistan shows that that mean annual
temperature has increased over Pakistan in the recent past with greater
increase in Sindh and Balochistan. During the last century, the average
temperature over Pakistan has increased by 0.6°C, which is in conformity with
the increase of average global temperature. Future climate change projections
based on all the four IPCC-AR5 RCPs scenarios show that the average rise in
temperature over Pakistan by the end of the century will be about 1°C higher compared
to global average. This increase particularly in temperature is associated with
a number of adverse impacts, including the increasing frequency of extreme
events (floods, droughts, heat waves, and cyclonic activity), steady regression
of most glaciers (except a small minority in the Karakorum Range) that supply
the bulk of the country's water supply and changes in the rainfall patterns.
Besides, Pakistan’s water cycle is primary
effective area of climate change. Furthermore the agriculture is one of the
major sectors likely to be adversely affected by climate change. Climate change
can disrupt food availability, reduce access to food, and affect food quality.
Projected increases in temperatures, changes in precipitation patterns, changes
in extreme weather events, and reductions in water availability may all result
in reduced agricultural productivity. Moreover, the seasonal smog is also due
to climate change and pollution.
Likewise, Pakistan has also suffered economically
due to climate change. According to experts, Pakistan has faced around 150
freak weather incidents as a result of climate change in the past 20 years:
flash floods, smog in winter, forest fires in summer, melting glaciers, freaky
heatwaves, landsides, displaced population, etc. During floods in 2010-11,
almost 10% of Pakistan’s population was displaced in 2 provinces, one in the
North and another in the South. Last year, the costs of extreme weather as a
consequence of climate change, were listed at $ 384 million and in the past 20
years, there has been a cost of almost $ 2 billion to the national economy
because of the ravages of climate change.
As the
handwriting is on the wall, the world is responding to the danger, at present especially
the young—Greeta Thunberg a Swedish environment activist who shakes the top
leaders with the Global Climate Strike call on September 20, 2019, through
which the protest was recorded in around 150 countries on more than 4500
places.
Similarly,
at the international level, the world’s organization have shown its commitment
to fight in this noble cause. There various agreements and protocols for
climate change. The United Nations Framework Convention on Climate Change
(UNFCCC) is the main international agreement on climate action. It was one of
three conventions adopted at the Rio Earth Summit in 1992. To date, it has been
ratified by 195 countries. It started as a way for countries to work together
to limit global temperature increases and climate change, and to cope with
their impacts.
Besides,
in the mid-1990s, the UNFCCC signatories realised that stronger provisions were
needed to reduce emissions. In this regard, they agreed to the Kyoto Protocol
in 1997, which introduced legally binding emission reduction targets for
developed countries. Next comes the Paris agreement; the Paris climate
conference took place from 30 November to 11 December 2015. On 12 December, the
parties reached a new global agreement on climate change. The agreement
presents a balanced outcome with an action plan to limit global warming 'well
below' 2 degree Celsius. Moreover, we also have the Montreal Protocol 1987, which
is a global agreement to protect the stratospheric ozone layer by phasing out
the production and consumption of ozone-depleting substances. Moreover there is
also United Nations Convention to Combat Desertification (UNCCD) 1994 to combat
desertification and mitigate the effects of drought in countries experiencing
serious drought/ desertification.
What
requires is that we must change course by 2020, as the UN Secretary-General Antonio
Guterres has said, we risk missing the point where we can avoid the “disastrous
consequences for people and all the natural systems that sustain us.”
In this
regard, there are the following suggestions to tackle global warming. Dramatically
reducing our use of fossil fuels especially carbon-intensive coal-is essential
to tackle climate change. There are many ways to begin this process. Key action
steps include: not building any new coal-burning power plants, initiating a
phased shutdown of coal plants starting with the oldest and dirtiest, and
capturing and storing carbon emissions from power plants. While it may sound
like science fiction, the technology exists to store carbon emissions underground.
Furthermore,
taken together with the tropical deforestation and emissions from agriculture
represent nearly 30 percent of the world's heat-trapping emissions. We can
fight global warming by reducing emissions from deforestation and forest
degradation and by making our food production practices more sustainable.
Besides,
using alternative sources of energy is more efficient and meets the problem of
global warming. Energy producing from solar, wind, tidal, biomass are more
clean and renewable. There are least effects if we produce electricity from
alternative sources of energy. Further, nuclear power results in a few
global warming emissions, an increased share of nuclear power in the energy mix
could help reduce global warming.
Above and
beyond, a successful global compact on climate change must include financial
assistance from richer countries to poorer countries to help make the
transition to low-carbon development pathways and to help adapt to the impacts
of climate change.
The
energy used to power, heat, and cool our homes, businesses, and industries are
the single largest contributor to global warming. Energy efficiency
technologies are the dire need of the hour.
The
transportation sector's emissions have increased at a faster rate than any
other energy-using sector over the past decade. For this, efficient fuel
consumption modes of transport and switching to low-carbon fuels is the
requirement of time.
In a
nutshell, we must develop a two-pronged approach: firstly, we must reduce
emissions and stabilize the levels of greenhouse gasses in our atmosphere, secondly,
we must adapt climate-friendly lifestyle and pursue the principles of
sustainable economic growth.
To
conclude, although Pakistan is facing environmental challenges, which include
climate change impacts, loss of biological diversity, deforestation and
degradation of air and water quality. Despite that, Pakistan responds well.
Because of the deteriorating economy, the country could not do much. But still,
the present government has launched Ten Billion Trees Tsunami Program (TBTTP)
to lead the country towards aiming at revival of forestry and control air,
weather, wildlife, forestation, watershed management and soil conservation to
combat the negative impacts of climate change. Furthermore, the country is
amongst pioneers who establishes climate ministry. In addition, the country has
also launched the Climate Change Policy 2012. The National Climate Change
Policy comprehensively addresses all possible challenges of Climate Change and
provides a foundational framework to tackle the problem. But Pakistan alone
cannot do it. It is a global issue. The whole of the world’s future is at
stake. It is high time for the United Nations, along with all 195 countries, to
not let the grass grow under its feet and act now to save the mother earth.
Hafiz Muhammad Azeem
The writer is an advocate of the High Court and
teaches law.
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