Global warming has become an issue of discussion which affects
our humanities sustainability and our local as well as global ecosystem.
The issue of global warming cannot be discussed without its negative
effects on the environment, its causes of climate change and how this
then trickles down to affecting humans. Essentially, global warming is
caused by both climate change, but mainly the actions of humans and
society as a whole. A brief discussion about climate change will inform
this essay, then the negative effects of global warming will be
described, followed by the positive changes needed in Canada, in order
to defuse and reduce the risks of global warming. Solutions and
recommendations to reduce the detrimental effects of global warming will
be proposed, and the position will be taken, that the greatest
importance is to take care of the negative consequences of global
warming because we are in dire need of dealing with the damaging
effects.
One the most
impactful changes to the ecosystem are the forces of climate change. One
of the causes of climate change is the consequence of global warming.
When global warming occurs, it affects temperature and precipitation.
This in turn will affect any living creature, such as fauna, vegetation,
humans and all living things on the planet. When global warming
happens, it causes an imbalance and various regions. Prairie ecozones
will grow and forested ecozones will contract as precipitation levels
fall. Furthermore, due to droughts caused in the Prairie Potholes, this
then creates a reduction in population of varying species. It has been
said that Thirty to fifty percent of prairie ponds will hold less water
by spring 2060. This factor will in turn cause a reduction in ducks
settling to breed in these usual areas. Due to the different animal
cycles being disturbed, insects, animals used a prey and foods usually
available for animals, will be jeopardized.
Directly related to
the phenomenon of global warming, are the changes that occur in
particular seasons. Spring migration is happening earlier in the year
and fall migration is occurring later for many types of species. Sadly,
the climate change caused by global warming then causes a plethora of
extinctions. The reason for this rise in the annihilation of certain
species is because many are incapable of adjusting to the rapid climate
changes. One species that global warming is affecting today is polar
bears. In both Canada and the U.S, polar bears are in the Endangered
Species Act due to the high rate of melting ice. As a result, climate
change will inevitably affect the cycle of the ecosystem, which then
influences the way energy and chemicals flow through carnivores,
herbivores, soil organisms and plants. Interaction between predators and
prey structure the food webs, causing changing conditions in the food
chain.
The cause of global warming is ultimately related to the
shift in the atmosphere, caused by gases that humans are causing.
Scientifically, global warming refers to an increase in the earth's
average surface temperature, one aspect of climate change. After
absorbing radiation emitted from the surface, greenhouse gases
subsequentially reemit infrared energy of slightly different
wavelengths. Some of those gases travel back downward, warming the
troposphere and the planet's surface in a phenomenon known as the
greenhouse effect. Therefore, global warming refers to the ability of
one molecule of a greenhouse gas to contribute to warming. Although
greenhouse gases are one cause of global warming, it has been found that
the most negative cause of global warming is carbon dioxide (CO2), the
most potent of greenhouse gases. As Dr. Withgott mentiones "... carbon
dioxide's abundance in our emissions makes it the major anthropogenic
contributor to global warming". Another reason for the plight of global
warming is the release of methane (CH4) we humans cause when raising
livestock that emit methane as metabolic waste. Since 1750, atmospheric
methane concentrations have risen 250%, and today's concentration is the
highest by far in more than 65, 0000 years. It has also been recorded
that human activities have also augmented atmospheric concentrations of
nitrous oxides. These greenhouse gases, by-products of feedlots,
chemical manufacturing plants, auto emission, and synthetic nitrogen
fertilizers, have risen by 18%. After looking at the negative effects
that climate change and global warming has on our humanity and on our
earth, I decided to look into solutions that we could take individually
and as a global community to decrease the effects of global warming and
slow its progress.
Due to the high number of cities like Toronto
that are experiencing similar situations and even worse, a discussion to
propose solutions needs to occur. Here, I will be looking at varying
places in Canada to identify some key actions to a healthier
environment. Many cities are already experiencing environmental
downfalls like pollution and smog. Hence, there needs to be
sustainability plans in place to diminish the effect of city
urbanization on the environment. First and foremost, the reduction of
using cars is necessary. Public transportation, bikes, car pooling are
all options that can reduce the density in cities and can disable
negative environmental conditions like smog and pollution. Another
problem that most urbanized cities face is lack of space. If the
reduction of space in cities is made a priority, then we would see
immediate changes in the climate of these cities. Using less land for
housing and retailers will make more room for more public transit and
the rejuvenation of natural land and resources. Along similar lines in
reference to housing, when new buildings and urban systems are designed,
they could have designs that reduce energy waste. An example of this is
shown when new builders build edifices to last longer and policies need
to be in place in order to encourage sustainability. Another way to
reduce space is combining retail and housing into one building.
During
construction, the choice of material can also make a difference. Using
materials such as pravtex boards, which are made of almost 90 - 95% of
waste wood that is which provides a variety of boards for different
applications such as walls, floors and roofs. Boards are applied over
the structural elements of buildings to form a continuous, insulated,
breathable shell. Moreover, lime-hemp, aerated clay block, aerated
recycled concrete and sheep's wool insulations are compatible with and
capable of enhancing the energy performance of more established
materials. All of these supplies can be upgrades to older houses and do
not need to be used in new buildings or homes. Finally, the "green roof
technology" is an interesting way in cleaning the air. Green roof
technology is a refurbished roof with growing plants, shrubs and trees.
These ideas will improve the current conditions of cities and coincide
with "green" ways of building and renovating.
Another solution
worth mentioning is the Kyoto Protocol. This protocol involves
thirty-eight developed countries monitoring their toxic gases such as
carbon dioxide and methane, in order for these amounts not to exceed
their assigned amounts. The control of the percentage of gases released
into the atmosphere is matained through an incentive program. Emission
credits are granted to individuals or businesses that reduce gas
emission rates as a result of changed practices. In Toronto for example,
the city has a number of plans that would provide incentive to
residents and businesses to encourage communities be more "green" and be
environmentally friendly. The Home Energy Assistance program pays
residents up to a thousand dollars when they upgrade their home
insulation is one example of such a program. Recently, another program
was launched, whereby harmful green house gas emissions and smog causing
pollutants secreted in lawn mowers, trimmers and leaf blowers, are
reduced. It is these types of programs that create a domino effect of
town hall meetings where people are encouraged to become involved in
sharing their ideas about environmentally safe actions and daily
activities. The positive aspect of these meetings is that there are
environmental specialists participating, providing tips to residents on
how to decrease the amount of toxicities in the air by changing the way
one upkeeps their laws and being mindful of harmful household products.
In our homes, we can make a conscious decision to use natural cleaning
products and energy saver sources of light that are not harmful to the
environment once sent away to our garbage landfills. Moreover,
renovations of homes can be consciously eco-friendly by deciding to use
"greener" materials.
Along with these conscious changes, there are
the programs that come to mind as being helpful to Canadian cities like
Toronto. The first is the Natural Step, which is a great program that
works with neighbourhoods in Canada. Borrowed from this program in
Sweden during the 1980s, it is a program that endorses a science based
definition of sustainability and strategic planning. The focus of this
program is to eliminate overall synthetic chemicals released in our
environment. The second comes from an idea from the Netherlands. Their
communities have created a "greenhouse powered neighbourhood". This
locality relies on solar heat that is collected and then stored in local
groundwater, used to warm greenhouses during the colder months. The
third stems from the Simon Fraser University in Vancouver, whereby a
sustainable community is being built. This space in Vancouver utilizes
the natural hydrology of the area for design, landscaping and
infiltration systems, to preserve the absorption of rainfall into the
ground. The goal of this system is to use natural energy and transform
this energy into efficient as well as useful, sustainable sources.
To
conclude, the onus is on humans to create solutions and systems that
will minimize the dangerous effects that global warming and climate
change have on our cities, populations and the environment. The
demanding lifestyles, high standards of living and intense usage of
energy supported by fossil fuels in countries like Canada, are
violations against our environment. The harmful effects of the
continuation of such lifestyles need to be understood locally and
globally. We are in dire need of environmental experts to find
strategies that will encourage and reward everyone for their
contribution. It is then that these environmentally friendly lifestyles
can replace our old habits and can be passed to the next generation to
come.