1. Introduction: It is certainly known we are changing the climate and, as an example, we have many new symptoms since 1950s, such as increased sea level, warmed oceans and atmosphere, or decreased amounts of snow and ice (IPCC, 2013). We recognize as well that the atmospheric concentrations of the greenhouse gases carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) have increased since 1750 in an exceptional form in the last 22,000 years due to anthropogenic activity (Figure 1). However, scientists have difficulties to understand how the climate is changing and how it is going to change in the future (IPCC, 2013). 2.
Global warming is the rise of earth’s global temperature caused by the over release of greenhouse The solution for global warming gases. Greenhouse gases are gases the are be able to absorb infrared radiation in earth’s atmosphere. With an imbalance greenhouse gases in the atmosphere, the earth is becoming warmer and warmer. As the main effector of the greenhouse effect, CO2 has played the most important role in the global warming. Humanmade CO2 continues to increase above levels not seen in thousands of years.
However, it seems to be irrelevant when the emissions of greenhouse gases from human activities within hundreds of years are compared to that from the nature in the whole geological history. In fact, there are 150 billion tonnes of carbon produced from natural process each year, about 30 times carbon from human emissions, according to Beck (2006). Nevertheless, human activities’ emissions matter due to the fact that, while the released emissions from natural events are absorbed and balanced by the natural process, human emissions remain in and alter the composition of the atmosphere. As a result, emissions from human activities are the main factors that contribute to the imbalance of greenhouse gas concentrations and greenhouse effect. In conclusion, the combustion of fossil fuels and deforestation are the main sources that cause greenhouse effect.
This was figured out by taking the number of grain produced by each employee, 10 tons, then divided by how many of cars that could be made by the same employee, 4. 10/4 = 2.5. Cost of grain would be the inverted equation, cars per year divided by tons of grain each year, or 4/10 = .4. a) Which country has an absolute advantage of producing cars and grain? Unfortunately, both Japan and U.S. don’t have an absolute advantage when making care, both countries approximately make 400 million cars a year. The US is the leader of the two countries with producing grain, we have a larger output per full time worker.
The rise in temperature attributed to the greenhouse effect since preindustrial times is 0.8-1.2 C [ degrees centigrade ] with another 0.5 C factored to rise within the next two decades. Many scientists and governments as well as the United Nations framework convention on climate change have adopted a 2 C rise in temperature as the upper limit of safety and this equates to a concentration of 450 ppm to be achieved with an 80% reduction in carbon emissions by 2050. The main clue that the greenhouse gases were not the only, or major cause of global warming came fortuitously from David Attenborough 's 'Life in Cold Blood: The Cold Blooded Truth ' [ The world of Reptiles & Amphibians ] screened recently. As all reptiles are exothermic requiring the sun 's heat rays for energy, the iguanas shown living on an island had to dive several metres to be able to harvest the sea grasses on the sea floor, so they would lay on the rocks of mounds jutting up above the
One of the main pollution sources are the exhaust gas from the internal combustion engines, which provide up to 80% of the total consumed energy in the world. According to the Centre for Environmental Monitoring’s report, 70% of air contamination in Hanoi is caused by the endless streams of traffic. The process of fuel combustion is creating the polluting gas such as CO, CO2, SO2, NOx, Pb, CH4, HC. Specifically, the transportation activities contribute nearly 85% of carbon monoxide (CO), 95% of VOCs. In the period of 2016-2020, there have been 53 million motorcycles, 560,000 cars (vietnamnews’ report).
INTRODUCTION Since the discovery, fossil fuels are dominating as the main energy source. Even now half of the energy is produces from the fossil fuels. According to the stats of the International Energy Academy in 2014 consumption of the crude oil was around 40.7% followed by the natural gas and coal by 15.2% and 10.1% respectively. Where biofuels and other renewable sources contributed just about 15%. [1]The major drawbacks of using the fossil fuels is they raises serious environment causes, like very high amount of carbon dioxide production which affects the humans and responsible for ozone layer depletion and global warming.
Well, that's what land pollution, is it's basically pollution on land. Based on the information from http://poopy.org/land-pollution/land-pollution-facts/ it claims that, due to land polliton, the earth loses approxpitly 25 billiom tons of valuble topsoil each year. In addition to that, it take about 500 years for 2.5 centimeters of topsoil to regenerate, and the united states loses soil at a rate of 17 times higher than it takes to generate a new topsoil. Oddly enough, approximately 30% of the air pollution in San Francisco originates in
1-2-3 The Impact of Built Environment on Nature: The United Nations Environment Programme-UNEP reported that the building sector contributes up to (30%) of global greenhouse gases and consumes up to (40%) of all energy. It also consumes around (30%) of the world’s resources and (12%) of its water, whilst producing around (30-40%) of the wastes going to landfill (Khatib, 2016). Another study made in the United States, and listed a significant effect of buildings and communities on the environment and human health including (38%) of CO2 emissions, (24%) to (50%) of energy use, (72%) of electricity consumption, (40%) of raw materials use, (14%) of potable water consumption and (30%) of waste output (USGBC, 2015) The traditional approach for clinical waste, agricultural waste, industrial and municipal solid waste, industrial and municipal liquid waste, etc. can be considered disastrous worldwide because it is depleting the natural resources and may pollute the environment if it is not treated/disposed of properly (El-Haggar, 2007). The built environment can also be a source of water pollution and land pollution incase of draining the sanitary discharges towards natural water
In the last thirty years around fifty percent of the total coral reefs have been lost, and in around fifty years there may be none left (Becatoros, 2017). Coral decline has drastically increased since the industrial revolution. The industrial revolution is the period between the eighteenth and nineteenth century where rural societies in England and the United States transitioned into being industrialized, which saw an emergence in the use of fossil fuels and large scale animal rearing. The industrial revolution saw a rise in methane and carbon dioxide in the atmosphere, which are waste products of animals and fossil fuel burning respectively. These gasses destroy the ozone layer and absorb heat respectively.