The need to offer hard facts stemmed from the criticism the environmental community has received from politicians and naysayers who believe that an ulterior motive is integrated into the message of cleaning up the environment.
Therefore, I intend to use this essay to discuss the meaning of global warming and how it will affect human life in the near future. As earlier stated, global warming is caused by carbon dioxide and greenhouse emission produced in large quantities by human activities. These activities include the burning of fossil fuel in our vehicles, industries and homes, and the massive deforestation occurring in rural areas to provide building materials, paper and fuel for human consumption. Due to climate change, rivers and oceans now overflow their banks leading to flooding of farms which are the sources of food and revenue for rural communities.
The result has been widespread malnutrition, mosquito population growth, and increase in malaria-related deaths and the spread of waterborne diseases which drastically reduces the quality of life in rural areas. Urban areas are also not left out, as irregular weather conditions have led to heat waves which have been responsible for approximately 30, deaths on a yearly basis. Wildfires are another by-product of a changing climate and they have led to displacements, disillusionment and anxiety among people who have been caught up in their part.
Although global warming affects the people of earth in diverse ways, everyone still suffers its ravages. Studies show that if the trend in which fossil fuels are being consumed continues, the year will witness unprecedented climate irregularities which could lead to approximately , deaths.
The inaccessibility of aquatic habitats, the large cost involved and the challenging nature of marine research contributes to the gap in the knowledge. To date, predictions of responses to change in animals have been primarily at the species level and based around 2 approaches. The first uses current species range climate envelops and then predicts future ranges by assessing where similar conditions are likely to be from climate models. Although widely used across studies Kruuk et al.
Species ranges lack the knowledge of adaptation rates and genetic and functional tolerance difference within and between populations. Similarly, the conclusions that can be drawn from using physiological approaches are limited, because they predominantly evaluate small numbers of species and because experimental rates of change are usually much faster than natural change.
There is therefore a key requirement to develop an approach that will improve our understanding of assemblage or community level processes and responses. One of the parameters that need to be considered when developing approaches to understanding how communities or assemblages will respond to environmental change, is the identification of the most vulnerable stages of the population.
The loss of such stages could have a great impact in the overall biodiversity. In this context, early life history stages have been identified as the most vulnerable stages to change Pedersen et al. The small body size, reasonably high mass-specific metabolic rates and lower energy reserves, decreases the capability of early life stages to select and migrate towards a suitable habitat, further increasing their vulnerability to climate change Rijnsdorp et al.
Such characteristics will also increase their mortality during periods of adverse environmental condition e. Studies of temperature tolerances of developmental stages in the laboratory are relatively rare, but those that have been conducted do not often show marked differences from temperature limits of adults.
C, but not above. Different species will vary in their responses to warming and this will affect their competitive abilities and fitness, potentially through variations in aerobic capacity and functional capability P?? Small changes in balance in early life history and colonisation stages in marine species are likely to give very large changes in community structure and ecosystem balance.
These factors, coupled with the very high ecologically-driven mortality in early life history stages, mean that investigations of warming effects on recruitment and early community development in marine benthic groups are an essential step towards understanding ecosystem level responses to change. The Antarctic sessile marine benthos Sublittoral sessile epifaunal assemblages are often characterised by similar group of organisms, potentially allowing comparisons of the effects of environmental variation on basic biological and ecological processes to be made between regions.
Scientists do not yet understand the underlying cause of such larger scale variations in solar activity, but do know that they can play a key role in shaping the Earth's climate. Global climate has been changing and still continue to change. Over a long period of time, climatic fluctuations may be such that, a shift in type of climate prevailing over a given area, takes place. In that case, we talk of a change in climate or climatic change. Various terms used to describe variations in climate, namely, climate variability.
Climatic fluctuations, climatic trends, climatic cycles and climatic change, refer to some appropriate time scales and can only be validly used within such time scales. The evidence of past climatic change is many and varied, such biological, lithogenic and morphological. Prior to the s, scientists largely believed that the shifts in climate between ice ages and warmer periods occurred over centuries and millennia due to the large amount of time.
Geologic evidence from the last decades, however, shows that there have also been rather abrupt periods of climate change spanning anywhere from years to decades. Abrupt climate changes can occur when variable that change gradually push the Earth's system across some limit of instability. One of the known examples of this rapid change is the Younger Drays, which was a sudden interruption gradual global warming that began 12, years ago after the end of the last glaciations.
Climate' variation occurs as a response to "climate forcing," which are factors that cause either a warming or cooling of the atmosphere. Over most of the Earth's history forcing have been entirely natural, caused by continental drift, variability in solar radiation, chain in the Earth's orbit, and volcanic emissions. However, since the industrial revolution, human activity has had a large impact on the global climate system, increasing the amount of greenhouse gases in the atmosphere, trapping heat and contributing to global warming.
While this may seem like a small change, global temperatures are generally quite stable. The difference between today global temperature and the average global temperature of the last ice age is only about 5t.
Keywords: climate change, global warming, greenhouse gases. Climate change in the world can be caused by various activities. When climate change occurs; temperatures can increase a dramatically. .
Essay about climate changes Nowadays climate change is the biggest problem of the human being. It is already happening and represents one of the greatest environmental, social .
Pollution Essay: Climate Change - This essay is going to describe what the greenhouse effect is and what it does. It is also going to say what causes the greenhouse effect and the consequences of it. Climate change is one of the most important global issues facing the world today. Climate change has the potential to drastically impact the future of the human race, and 4/5(22).
Global climate has been changing and still continue to change. Over a long period of time, climatic fluctuations may be such that, a shift in type of climate prevailing over a given area, takes place. Global climate change is caused by the fertiliser that used for agricultures. The result of microbial action in the soil, these chemical will release nitrous oxide. Besides that, the emission of methane and carbon dioxide will also affect climate changes.