For example, building infrastructures, managing waste disposal, the use of natural resources and energy consumption cost a substantial amount of money. The destruction of landuses on the edge of city is also resulted from outer urban growth. Isolation of people and their increasing dependence on motor vehicle as well as pollution of environment also attribute to urban growth. In order to manage urban growth, different groups, individuals as well as government take responsibilities and actions. Urban consolidation is one of the most effective management, which promotes an increase in medium density and high density housing in suburbs that already contain infrastructures.
Another form of atmospheric pollution that occurs in Perth is Haze. Haze is an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. It occurs mainly during the colder months of the year as domestic wood heaters release smoke into the atmosphere. Also occurs during autumn and spring when the burning of green waste, forests or farm paddocks release smoke into the atmosphere. Haze is particularly bad when Perth experiences a temperature inversion (when a layer of warm air moves over a dense layer of cold air trapping particulate matter within the cold
The smog in the city is not the most ideal for most people. With all the refineries and manufacturing plants putting out all their smoke; and cars with all their emissions there is an abundance of smog. One of the things I missed most was not being able to look up and see all the stars or remember what fresh air was. It seemed like the only time I would catch a breath of fresh air was when it was raining. Living in the country, now that was a different story.
Nowadays the urban population is larger than the rural population and growing cities are using rural space to expand, sacrificing natural habitats. This in return has an impact on our environment as bigger cities are responsible for more pollution. A reduction in green spaces due to growing cities has also an impact on our environment as natural habitats are destroyed or restricted, which may result in extinction of certain species. Locally where I live there is currently a huge discussion on building new housing estates on a big green belt around the city however this will not only reduce the green space, it will also build a risk to the new houses of flooding and will have a huge impact on the local environment. Bird and nesting spaces are at risk and the plans will bring a big rise in people moving to this area.
Bangladesh is expected to see an increase of over 10% in its levels of precipitation by 2050, this will be linked to the increasing temperatures of the bay of Bengal, which if it becomes warmer it means the levels and magnitudes of tropical cyclones, this could cause huge problems for Bangladesh, and cause large numbers of people to move from coastal cities in land, this mass migration may cause tensions between the regions, and may even extend to between countries as many Bangladeshi’s are expected to migrate to neighboring country India. Furthermore this mass migration could be exasperated by the increase in the number of floods and storm surges caused by a rise in sea level, and given the fact that Bangladesh’s geography means that over 20% of the land is under 1 meter above sea level it could cause huge numbers of deaths and perhaps a contamination of local water supplies due to the becoming salinated. And the prevalence of water Bourne diseases such as cholera could increase to dangerous levels. Furthermore in Bangladesh over 50% of the population is reliant on agriculture as a source of income, global warming is expected to cause a longer wet season, this will be good as it will enable Bangladeshi farmers to achieve a higher yield of crops such as rice crops ( which need a wet environment) and may even go to the extreme of being able to plant multiple crops and
This can lead to heavy traffic; vast amounts of waste, a lack of food, water and housing which are all the characteristics of an unsustainable city. However, these problems can be dealt with when a city has good urban planners, consolidative infrastructure and the capacity for change and development as demonstrated in the city of Stockholm, which shows that developing a sustainable city is possible. The city of Mumbai in India is highly unsustainable. Its population has increased by 10 million people in the past 30 years turning it into a mega city with a population of over 20 million people. Due to the rapid increase in population, the city has not had time to develop to the vast numbers of people who now inhabit it.
These effect people differently like children are a lot more susceptible to malnutrition and starvation because they need more nutrients. It doesn’t just affect people living in the areas affected by drought because the people who flea the Sahel go to the surrounding countries who have problems because suddenly there is a lot more demand for essential things in life due to an increase in population. There would be a bigger demand for things like homes, food and electricity. The increase in demand for electricity would mean more fossil fuels being burned thus polluting the atmosphere more and contributing to global warming therefore heat the Sahel even
This is a problem because more people create more waste which needs to be disposed of; also increased car ownership e.g. there are 30 million more cars on the road in the UK today than there was in 1950. There are schemes in place which have been set up to manage the impacts of urban growth and create sustainability for future generations. However, the schemes are often the easiest and cheapest in the short term e.g. disposing of waste in landfill sites rather than the more sustainable.
This is due to an increased concentration of greenhouse gases. These effects may not be direct to all organisms, they may have a secondary impact such as loss of habitat, disrupted food chains and denaturation of enzymes. One of the biggest and possibly most obvious outcomes of rising global temperatures is the rising sea levels. The lower lying cities and countries in the world, for example, Venice in Italy, are likely to become flooded more frequently, and in time, may even become completely submerged in water. This would mean that any organism whose niche does not incorporate the new conditions are more likely to move away from the area, or be wiped out - this is more likely to happen to the more terrestrial animals.
An approximate rule of thumb suggests that reaction rate - and hence the rate of heat generation - doubles with every 10°C rise in temperature. Thermal runaway can occur because, as the temperature increases, the rate at which heat is removed increases linearly but the rate at which heat is produced increases exponentially. Once control of the reaction is lost, temperature can rise rapidly leaving little time for correction. The reaction vessel may be at risk from over-pressurisation due to violent boiling or rapid gas generation. The elevated temperatures may initiate secondary, more hazardous runaways or decompositions.