Cause and effect relationships may be used to predict phenomena in natural or designed systems. Engage 25 minutes I start the lesson by building and activating prior knowledge, writing the word climate on the board and asking students to try to define it by sketching a picture.
Global Warming Potential year: Greenhouse Gas Emissions and Sinks: Larger image to save or print. The main human activity that emits CO2 is the combustion of fossil fuels coal, natural gas, and oil for energy and transportation, although certain industrial processes and land-use changes also emit CO2.
The main sources of CO2 emissions in the United States are described below. Electricity is a significant source of energy in the United States and is used to power homes, business, and industry.
The type of fossil fuel used to generate electricity will emit different amounts of CO2. This category includes transportation sources such as highway vehicles, air travel, marine transportation, and rail. Note that many industrial processes also use electricity and therefore indirectly cause the emissions from the electricity production.
However, emissions and removal of CO2 by these natural processes tend to balance. Since the Industrial Revolution began aroundhuman activities have contributed substantially to climate change by adding CO2 and other heat-trapping gases to the atmosphere.
In the United States, sincethe management of forests and other land has acted as a net sink of CO2, which means that more CO2 is removed from the atmosphere, and stored in plants and trees, than is emitted.
Since the combustion of fossil fuel is the largest source of greenhouse gas emissions in the United States, changes in emissions from fossil fuel combustion have historically been the dominant factor affecting total U. Changes in CO2 emissions from fossil fuel combustion are influenced by many long-term and short-term factors, including population growth, economic growth, changing energy prices, new technologies, changing behavior, and seasonal temperatures.
Between andthe increase in CO2 emissions corresponded with increased energy use by an expanding economy and population, an overall growth in emissions from electricity generation, and increased demand for travel. Reducing Carbon Dioxide Emissions The most effective way to reduce CO2 emissions is to reduce fossil fuel consumption.
Many strategies for reducing CO2 emissions from energy are cross-cutting and apply to homes, businesses, industry, and transportation.
EPA is taking common sense regulatory actions to reduce greenhouse gas emissions. Examples of Reduction Opportunities for Carbon Dioxide Strategy Examples of How Emissions Can be Reduced Energy Efficiency Improving the insulation of buildings, traveling in more fuel-efficient vehicles, and using more efficient electrical appliances are all ways to reduce energy consumption, and thus CO2 emissions.
Energy Conservation Reducing personal energy use by turning off lights and electronics when not in use reduces electricity demand. Reducing distance traveled in vehicles reduces petroleum consumption. Both are ways to reduce energy CO2 emissions through conservation. Fuel Switching Producing more energy from renewable sources and using fuels with lower carbon contents are ways to reduce carbon emissions.
Carbon Capture and Sequestration Carbon dioxide capture and sequestration is a set of technologies that can potentially greatly reduce CO2 emissions from new and existing coal- and gas-fired power plants, industrial processes, and other stationary sources of CO2.
Some of the excess carbon dioxide will be absorbed quickly for example, by the ocean surfacebut some will remain in the atmosphere for thousands of years, due in part to the very slow process by which carbon is transferred to ocean sediments.Which human activities are changing our climate, and does climate change constitute a significant problem?
We will investigate these questions through an introduction to climate processes and an exploration of climate from the distant past to today. The GWP of SF 6 is 22,, making it the most potent greenhouse gas that the Intergovernmental Panel on Climate Change has evaluated.
To find out more about the role of fluorinated gases in warming the atmosphere and their sources, visit the Climate Change Indicators page. Global warming, or global climate change, is a term that refers to the greenhouse effect and the impact it has on our earth’s atmosphere.
This is caused by our societies increase use of fossil fuels in cars and the production of electricity. The greenhouse effect 2 The climate system 4 Global energy balance 4 Global water cycle 6 • the basis for scientific concern at the prospect of human-induced climate change; The Greenhouse Effect and Climate Change 3 Figure 2.
An understanding of global warming and the associated climate change draws on a number of disciplines.
Geophysical fluid dynamics is necessary to understand the structure of the basic climate system within which these climate changes occur. In nuclear physics and nuclear chemistry, nuclear fusion is the process by which multiple like-charged atomic nuclei join together to form a heavier nucleus.
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