The Scientific Texts That Guide Human Activity

We have already defined science as texts in our paper "a new definition science - The textual foundation that represents reality". Technology should be defined in terms of texts because of its scientific nature. In the modern world, science and technology are inextricably linked and inseparable.

The core technology of science texts

Texts are considered the core science of science. Technology should also include texts due to their essentially identical nature. We are not going to repeat the textual nature or technology of science and technology. Interested readers can refer to our article "language – the core of science".

Science can represent all things, even human behavior. Human activities are also represented and accumulated. Texts contain details about the procedures and methods used to achieve these results. These texts are then made into representations. The textual representations allow humans to organize, classify, and build upon already existing technologies.

In this lesson, students will look at the graphs that show GHG emissions and their growth in connection with human activities. They will be focusing on CFCs , CFCs and . Students will be able to calculate their own contribution to the emissions. If you've been using other activities on this section of the Global Climate Change section of this website You may find that this one a great conclusion to see if students are able to talk about the subject and make connections to what they are doing. Background Many researchers believe that our activities are changing the composition of the atmosphere , by increasing the quantity in greenhouse gases (GHGs). Greenhouse gases naturally occur in the atmosphere , and their presence causes what scientists in the field of atmospheric science call "the greenhouse effect.. It is vital to understand that this effect is the one that keeps the planet warm enough that it is habitable. 

The increased greenhouse effect is connected to an increase in GHG emissions caused by human activities. Nitrogen (78 percent) as well as oxygen (21 percent) comprise 95% of the dry atmospheric air. The remainder of the gases, which include GHGs are collectively classed as "trace" gases due to their low levels. http://www.ucar.edu/learn/1_4_2_20t.htm (1 of 9) [7/25/07 2:23:06 PM] Activity 20 Teacher Guide: Human Activity and Climate Change The recent attention given to the greenhouse effect and global warming is based on the recorded increases in concentrations of some of the greenhouse gases due to human activity. Particularly interesting are methane, carbon dioxide, chlorofluorocarbons, nitrous oxide and Ozone. Apart from chlorofluorocarbons, the majority of these gases are natural and are also generated through human activities. Water evaporate is the largest GHG in the world. In contrast to the majority of atmospheric gases it is thought to be a "variable" gas. That is, the proportion of water vapor present in the atmosphere is able to vary according to the location and the origin from which the atmosphere. 

For instance, over tropical oceans, it could make up 4percent of the total quantity of gases, but when it is in the desert or at high altitudes, it could be almost nonexistent. Water vapor absorbs heat readily. When discussing gobal warming, however, people often don't consider water vapor. Why is this? The primary cause is the fact that our activity does not directly affecting the amount of water vapor. But, we can directly impact other GHGs. Even though other GHGs are less significant as water vapour, the increase in their concentrations can impact the global climate in profound and quantifiable ways. Carbon dioxide ( ) is considered to be the most significant human-driven GHG. The results of scientific studies show a clear global rise that is swift and increasing. This rise is primarily due to carbon emissions from carbon-based fossil fuels (motorized vehicles as well as electric power plants as well as homes heated with oil or gas) as well as the destruction and burning of forest land for agricultural use. Methane ( ) is a major process that occurs naturally in the biological system but it can be increased through human activity. Methane is released from the decomposition of organic matter in soils that are waterlogged (for example, wetlands or rice paddies) as well as from stomachs and digestive tracts animals that are grazing (for instance ruminants, for example). Human activities include the increase in rice cultivation, the increasing quantity animals, growing quantity of landfills, and leakage from natural pipelines for gas.

Chlorofluorocarbons (CFCs) are not a origin in nature; they are generated exclusively by human activities. CFCs have been utilized extensively as refrigerants for refrigerators, air conditioners, freezers, and heat pump. They are present in a variety of foam plastics and in the manufacture of electronics. Although CFC production has drastically diminished, these substances remain in the air for a considerable time and they will continue to be a source of pollution as GHGs over the course of many years. Human Activity and Climate Change Nitrous oxide ( ) is a naturally occurring GHG, which has increased significantly in recent years due to human activity. The gas is produced by power plants burning coal, and may be released due to the degradation of chemical fertilizers within the soil. The gas ozone ( ) can also be an greenhouse gas. It is essential not to misinterpret the presence of ozone in stratosphere (a positive aspect) in the absence of the ozone in troposphere (a negative aspect). In the troposphere area, ozone may be a significant component of urban smog that can harm crop production and aggravates respiratory issues in addition to increasing the greenhouse impact.