Talk about causes and consequences of one type of environment pollution
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CTVVIP
12 tháng 3 2021
Water pollution is a source of water contaminated with chemicals or foreign toxins that are detrimental to the health of users, plants or animals. Water pollution occurs when harmful substances enter water bodies such as lakes, rivers, oceans, etc., which can be dissolved, suspended or deposited in the water. The water pollutants include: fertilizers and pesticides from agricultural production; wastewater and waste from food processing; lead, mercury and other heavy metals; Chemical waste from industries. It leads to many consequences. Almost all types of water pollution are harmful to the health of humans, animals and plants. Heavy metals from industrial processes can accumulate in nearby lakes and rivers. They are toxic to marine organisms such as fish and shellfish, and subsequently to those who eat them. Sulfate particles from acid rain can harm the health of organisms in rivers and lakes. And many consequences more. How to solve this problem? We can treat waste water properly, lractice green agriculture, have law and policy against water pollution, treat Industrial wastewater,......This is my talking aboute water pollution. Thanks for listening
TH
19 tháng 3 2021
Noise pollution is a very special type of pollution.
(Definition:) It is known to be the exposure to some high sound levels that may lead to adverse effects in humans or other living organisms. (Causes:) Noise becomes harmful when it exceeds 75 decibels (dB), such as the sound at a busy residential road. Noise is painful when above 120 dB, such as the sound of a jet taking off. (Effects:) Noise pollution affects not only the hearing but also the nervous system. It can make us deaf or have high blood pressure, nervousness, hearing loss, and sleep disturbances.
Bài này cô viết về ô nhiễm tiếng ồn, một loại ô nhiễm xảy ra ở cuộc sống hiện đại.
Cô chúc em học tập vui vẻ và có nhiều trải nghiệm bổ ích tại Hoc24.vn nhé!
VB
21 tháng 1 2019
Nowadays, one of the biggest problems human are facing with is water pollution. Water pollution is defined as the presence in groundwater of toxic chemicals and biological agents that exceed what is naturally found in the water and may pose a threat to human health and/or the environment. A lot of causes are responsible for this issue. And they lead to extremely bad consequences. I’d like to explain more in the following paragraphs.
Some typical causes of water pollution are Industrial waste, Sewage and waste water, Mining activities, Accidental Oil leakage, Burning of fossil fuels, Chemical fertilizers and pesticides, … These agents contribiute to water pollution.
And the consequences? Of course, it is human health! Human are likely to get into trouble with some diseases such as hepatitis by eating seafood that has been poisoned. Water pollution also brings about the death of aquatic (water) animals, Disruption of food-chains, Destruction of ecosystems.
In conclusion, water pollution is a alarming problem that needs to be solved as soon as possible. The sooner we solve it, the more healthy we are.
TT
27 tháng 4 2019
I.water pollution
Artificial causes from people and production affect the water environment
1. From human beings
Every day there is a large amount of domes waste into the environment without treatment, in addition to increasing population, the amount of domes waste also increases. In developed countries, the population growth rate is about 5% while the population growth rate in developing countries is over 2%.
Domes wastewater is waste water generated from households, hospitals, hotels and schools, containing wastes during human daily life and sanitation. The basic composition of domes wastewater is organic biodegradable organic substances (carbohydrates, proteins, oils, nutrients, solids. Depending on living standards and lifestyle, the amount of wastewater as well as the load The substances in each person's wastewater in a day are different, and the higher the living standard, the higher the amount of waste water and the discharge load, so the disease has conditions to spread and pollute the environment.
2. From agricultural production
Agricultural activities such as animal husbandry, animal urine, unprocessed and environmental uneaten food and other agricultural activities. Pesides, fertilizers from rice fields, melons, gardens, vegetables contain toxic chemicals, can contaminate groundwater and surface water.
In the process of agricultural production, most farmers use pesides three times the recommended dose. Not only that, farmers also use banned pesides such as Thiodol, Monitor ... In the process of fertilizing, spraying, farmers do not equip with labor protection tools.
Currently, the use of chemical fertilizers and chemical pesides is rampant in agriculture, causing water sources to be affected. Quantification of residues will sink into the aquifers that affect the amount of water.
Most farmers do not have storage facilities for medicines and medicines when they have not been used and are stored everywhere, including near cafeterias and drinking water sources. Most of the peside bottles used after being discarded were immediately thrown into the fields, the rest were collected for sale.
3. From industrial production
Waste and wastewater, from industrial production activities due to the speed of urbanization, industrialization and development have led to the establishment of industrial parks, thus the amount of waste and wastewater of activities The industry is growing and has not been thoroughly treated directly into the environment or rivers, water sources affect the current water quality.
Natural causes affect the water environment
Any water quality degradation phenomenon causes water pollution. Water pollution due to rain, snow, flood ... or by the casca of living organisms' activity not to mention their corpses. Trees and organisms die, they are decomposed by microorganisms into organic matter. A part will infiltrate into the ground, then penetrate deep into the groundwater, pollute, or follow the flow of groundwater into the big stream.
Flooding can cause water to lose its purity, stir up contaminants, grime in sewers, carry many toxic waste from garbage dumps, and carry on with previously stored substances. .
Prolonged flooding can be more heavily polluted by chemicals used in agriculture, industrial waste, chemical pollution ... Water pollution due to natural factors (volcanoes, storms, floods, erosion ...) may be very serious.
The deterioration of water quality may be due to geological characteriss of water sources such as water on acid sulphate soils often contain a lot of iron, aluminum, water taken from the ground often contains a lot of calcium ...
Measures to overcome the causes of water pollution
People should become more aware of their living environment protection, enterprises should have tanks to treat waste water before being discharged into the environment. The authorities and mass organizations need to regularly inspect companies to avoid the situation of profit that companies do not comply with environmental protection laws.
In addition, people should also protect their family's health by a family water well filter system, a water treatment machine to completely remove contaminants, toxic substances and heavy metals. .. create pure water to drink water, directly without cooking.
The above are the causes of water pollution today, hope that through this arle, people can be more aware to protect the water environment more clean and safe. Because clean water is essential to a healthy life.
II. Air pollution
Causes of air pollution.
Air pollution due to natural factors:
Due to natural phenomena: volcanoes, forest fires, dust storms, or decomposition processes, decaying keratosis - natural plants ... This is an objective cause so it is difficult to predict and prevent.
Air pollution due to human factors
+ Industry: This is the largest source of pollution caused by humans. The process of pollution is the burning of fossil fuels such as coal, oil and gas, creating toxic gases (CO2, CO, SO2, NOx, unburnt organic substances: soot, dust ). Industrial sources are highly toxic, concentrated in a small space, and depending on the scale of production and the fuel used, the amount of toxic and toxic substances will be different.
+ Transportation: This is also a major source of pollution to the air, especially in urban areas and densely populated areas. The process of burning engine fuel creates toxic gases that affect the air such as CO2, CO, SO2, NOx, Pb, CH4 ...
+ Activities: Mainly due to cooking activities that use fuels to create harmful gases that pollute the local households and surrounding households.
Consequences of air pollution
For animals - plants.
+ Air pollution causes harmful effects to all organisms.
+ Sulfur dioxide, nitrogen dioxide, ozone, fluorine, lead ... directly harm plants when entering stomata, damaging the system to reduce drainage and reduce disease resistance.
+ Most fruit trees are very sensitive to HF. When exposed to a concentration of HF greater than 0.002 mg / m3, the leaves are burnt spots, deciduous.
+ Earth's warming due to the greenhouse effect also causes changes in plants and animals on Earth.
+ Acid rain also indirectly affects plants and lacks food Ca and kills soil microorganisms. It causes Al ion to be released into the water to damage the roots (absorbing feathers) and reduce the absorption of food and water.
+ For animals, especially pets, fluoride causes more disasters. They are poisoned by direct inhalation and through the food chain.
+ Acidic air pollutants will combine with water droplets in the cloud to make water acidic. When the water drops on the ground, it will harm the environment: killing trees, animals, fish, etc. Acidic water also changes the nature of water in rivers, streams, etc. harming the births. living things under water.
For man.
Dust:
+ Harmful effects of dust depend on the nature (composition) of dust, dust concentration, dust parle size, contact time and personal response.
+ Dust into the lungs causes mechanical irritation, pulmonary fibrosis leading to respiratory diseases.
+ Dust can cause eye, skin and blood sugar diseases and other body systems (Dust enters the body and dissolves in blood and body fluids), cardiovascular disease ...
+ Dust can cause cancer: dust containing toxic ingredients, asbestos dust ...
Dioxide Sulfur (SO2) and Nitrogen Dioxide (NO2):
Sulfur Dioxide (SO2).
+ Sulfur Dioxide is a gas formed by oxidation of sulfur (S) when burning fuels such as coal, oil, products of oil, sulfide ore, etc. SO2 is a gas that causes strong respiratory irritation, when inhaled. breathing of SO2 gas (even at low concentrations) can cause spasm of the bronchial straight muscles. Large concentrations of SO2 can cause increased mucus secretion in the upper respiratory tract mucosa and bronchial air branches. SO2 affects the function of the lungs, causing pneumonia, chronic bronchitis, causing cardiovascular disease, hypersensitivity in people with asthma, ...
+ SO2 poisoning through the skin reduces alkaline reserves in the blood, eliminates ammonia to the urine and releases saliva.
+ General toxicity of SO2 expressed in disorders of protein and sugar metabolism, lack of vitamins B and C, inhibition of oxidase enzymes.
Nitrogen Dioxide (NO2):
+ Nitrogen Dioxide (NO2): is a brown gas, produced by Nitrogen oxidation at high temperature. NO2 is a dangerous gas, has a strong effect on respiratory organs especially in susceptible groups such as children, the elderly, asthma sufferers. –If contact with NO2 will damage the lung mucosa, increase the risk of respiratory diseases, damage of lung, eye, nose, and throat functions, etc.
Carbon monoxide (CO)
+ Carbon monoxide (CO) combined with hemoglobin (Hb) in the blood to be a stable compound, cacboxy hemoglobin (HbCO), reduces blood oxygen transport capacity, leading to lack of oxygen in the blood ....
Ammonia (NH3)
+ NH3 is a toxic gas that can strongly stimulate the nose, mouth and respiratory system.
+ Exposure to NH3 at a concentration of 100mg / m3 in a short period of time will not have long-term consequences, but if exposed to NH3 at a concentration of 1500-2000 mg / m3 for 30 minutes, it will be dangerous to live.
Hydrogen sulfide (H2S).
+ H2S enters the body through pphooir will be oxidized to sulfate. Low toxicity compounds will not accumulate in the body. About 6% of the absorbed gas will be excreted through exhaled air, the rest after the metabolism is excreted in the urine.
+ At low concentrations, v stimulates on eyes and respiratory tract.
+ Breathing large amounts of H2S mixture will cause...
MP
2 tháng 5 2023
Topic3 Using a mobile phone
What are the advantages and disadvantages of using mobile phones?
* Benefit:
- Entertainment or work becomes easier and more convenient with smartphones
-Send and receive email (email) anytime, anywhere regardless of computer.
-Take a photo on your mobile phone and share it right on social networks
* Disadvantage:
- Disturbed sleep
Using mobile phones a lot is a cause of great stress
- Skin aging
Do you have your own mobile phone?
Yes, I have
What do you usually use it for?
I usually use it for my study or entertainment
How to use a mobile phone properly?
We should not play too much on mobile phones
Avoid using your phone in the rain.
Use up the phone battery.
Get rid of bad habits when using the phone
Y
27 tháng 4 2019
2. Talk about cause, effect of a certain type of pollution as well as solutions to this problem (water pollution)
Water pollution can be defined as the contamination of a stream, river, lake, ocean or any other stretch of water, depleting water quality and making it toxic for the environment and humans. It can occur in many ways: industrial activities like dumping waste which drains in the fresh water make it polluted; or agriculture activities like using pesticides, herbicides....; and the garbage that we throw everyday. And it effects seriouslly. First, water pollution truly harms biodiversity and aquatic ecosystems, makes the creature sick or even die. Next, it has very negative effects on human health because it is the cause of many diseasessuch as diarrhea, cholera, skin infections.... or dehydration because of lacking of fresh water. Besides, it destroys environmental landscape,..etc. But we can reduce water pollution in many effective ways like reducing the amount of water we use, having green agriculture or throwing rubbish into right places..... Water pollution is a serious problem, but we can solve it if we try hard!
There are many types of environment pollution in the world, air pollution is one of them. The main cause of air pollution is the smoke and dust released from factories. They are very toxic to us humans. And they are also very bad for the environment. In addition, air pollution is also generated from the exhaust fumes of motor vehicles such as motorcycles and cars. As a result, the air source in the flock is heavily polluted, causing a greenhouse effect, causing the Earth to heat up. The ice from the North and South poles is being melted due to rising sea levels, causing flooding. We need a way to fix them immediately, otherwise the consequences will be even more dangerous.