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TP
21 tháng 1 2018
pollution can directly cause hearing loss
a) noise
b) visual
c) thermal
d) soil
QN
25 tháng 1 2018
Causes of Thermal Pollution
- Industrial effluent discharge
Industries that use large amounts of water as coolant, for example in power plants, steel industries, smelters, paper and pulp mills and chemical plants, release the heated water into nearby water sources without first cooling it appropriately
- Urban runoff water
In cities that are covered by concrete and other man made materials in most parts are also causing thermal pollution. The streets, parking lots and other covered spaces are heated up by the sun. When rain or storm water falls on them, it absorbs the heat and runs of into the drains. This water is sometimes up to 10 Degrees warmer than the surrounding water. When untreated and allowed to flow into rivers seas or oceans, it causes thermal pollution in these waters.
Effects of Thermal pollution
Like the anecdote mentioned above there are ecological disturbances that occur when the temperature of water is increased.
- First and foremost the levels of Oxygen are reduced in warmer water. This leads to death of many species of fish and other organisms including plants.
- Higher temperature increases the metabolic activity of organisms in the water, causing them to consume more food. The resources of the ecosystem may not last for long in such a situation. Animals that can adapt to these conditions and are able to find more food tend to survive while others die.
- Some fish, amphibians and those that have a migratory life will avoid the spaces that are affected by thermal pollution. Bio diversity is affected as a result.
- Lesser oxygen content leads to conditions favourable for anaerobic bacteria which will increase in number. These digest their foods by fermentation, which adds to the contaminated condition of water and air.
- Changes and adaptations occurring at the cellular levels cause decreased productivity and shorter life spans. These can occur even at 2 degrees Celsius variation from normal.
- What happens when the water is colder than normal? When water is let off from dams, it is always the cooler deeper waters that are released, rather than the warmer surface water. In this case too, ecological changes occurs leading to shorter life spans, loss of species and alterations in biodiversity.
Thermal Shock
When there is an abrupt increase in the temperature of the water this leads to sudden death of all the fish and other organism in the water which are adapted to a certain temperature. This is called thermal shock. This is noticed when a power plant or an industry starts functioning for the first time and also when it has opened up after a break for repairs.
Control of Thermal Pollution
Heated water from industries can be treated before being released into the nearby water bodies. There are various mechanisms developed for this.
- Cooling ponds and cooling towers where the heat is released through evaporation convection, heat transfer and radiation. These are manmade structures.
- Cogeneration: a process by which the heated water is recycled for domestic use or industrial heating.
- Storm water runoff is directed to under-ground basins by infiltration or bio-retention. These are included in the planning of the city and part of the green infrastructure.
- Storm water basins are also in use but not as effective as these are exposed to the sun and its heat, not allowing the water to cool.
Conclusion
Though it may appear that thermal pollution may not affect humans directly, it is not true. Loss of bio diversity causes changes that affect all the aspects of the environment, because nothing is independent and no one survives completely on their own without relying on their environment.
There is the obvious effect on the food chain, where even now sea food collection has decreased dramatically, irrespective of all the food shows on TV which encourage massive consumption of a depleting food source.
Watching fish in an aquarium is a very effective relaxation therapy. Having a picnic by the river or lake is very invigorating. Listening to the buzzing of insects and the croaking of a watchful frog is companionable. Watching friendly dolphins leaping out of the water and grinning comically is very rejuvenating and inspiring.
Desiring to preserve the integrity of our environment is not selfish and planning and moving in this direction is the right thing to do.
Chỗ nào k cần thì b lược bớt nha 
TP
18 tháng 1 2018
Thermal pollution is the degradation of water quality by any process that changes ambient water temperature. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. When water used as a coolant is returned to the natural environment at a higher temperature, the sudden change in temperature decreasesoxygen supply and affects ecosystem composition. Fish and other organisms adapted to particular temperature range can be killed by an abrupt change in water temperature (either a rapid increase or decrease) known as "thermal shock."
Urban runoff—stormwater discharged to surface waters from roads and parking lots—can also be a source of elevated water temperatures.
H2
20 tháng 1 2018
When thermal pollution happens, the water temperature in streams, rivers, lakes, or oceans changes. It is one of the most serious types of pollution.
Thermal pollution can have many different causes. Power station are one factor. They use water in the nearby lakes or rivers to cool their equipment, which heats up the water. Then they dump the hot water back into its source. Thermal pollution may also happen due to the discharge of cold water from reservoirs into warm rivers.
Thermal pollution can have dramatic effects. Most aquatic creatures need a certain temperature to survive. Warmer water has less oxygen in it, and this can harm fish populations. Besides, warmer water can cause harmful algal blooms. This can change the colour of the water like in the first picture and, more seriously, the algea poisons the fish.
So, in many places, we build cooling towers like in the second picture to cool down the water from power stations.
VN
6 tháng 1 2019
Match each type of pollution with its definition, writing the answer in each blank.
| Answer |
Types of pollution |
Definitions |
| ____C_____ | 1. Air pollution | A. the increase of temperature caused by human activity |
| _____F____ | 2. Land pollution | B. the contamination of any body of water, such as lakes, groundwater, oceans, ect. |
| _____E____ | 3. Light pollution | C. the contamination of air by smoke and hurmful gases |
| ____H_____ | 4. Noise pollution | d. the release of unwanted radioactiven material into the environment |
| _____A___ |
5. Thermal pollution |
E. the brightening of the night sky preventing us from seeing stars by improper lighting of communities |
| ____G___ | 6. Visual pollution | F. the destruction of the earth's surface caused by the misuse of resources and improper dumping of waste |
| ____B____ | 7. Water pollution | G. anything unattractive or visually damaging to the nearby landscape |
| ____D_____ | 8. Radioactive pollution | H. any loud sounds that are either harmful or annoying to humans and animals |
#Yumi
7 tháng 3 2020
Find each blank with a word/phrase in the box
|
-Substance light pollution Earth's surface water -dumping -temperature -poison -waste -acid -surprised poisonous -air pollution |
1,if this factory continues...poison .... into the lake ,all the fish anh other aquatic animals will die
2,I think there is..air pollution..... around here because all trees and plants turn yellow and dry
3,when thermal pollution happens,the...water temperature.....in rivers,lakes and oceans changes
4,soil pollution happens when people destroy the...Earth’s surface.....
5,poison is a...substance...that can make people or animals ill or kill them if they eat or drink it
6,they are all...surprised..... to see that all the fish they grow on their farm are dead
7,you can see stars at night on the countryside because there isn't any....light pollution.... there
8,many households around the West lake dump..waste....into it so the water is polluted
9,the vegetable price is increasing because the....acid... rain has caused damage to almost vegetable in this area
10,the...poisonous....chemical waste in this factory is dumped into the river so its water now becomes almost black
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