Environmental problems are urgent! !
1. Population explosion
The population explosion in recent years is one of the main factors leading to global warming. At the same time, it also seriously threatens the balance between natural ecological environment. With such a large population, the carbon dioxide emitted by itself every year will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, which will directly affect the climate change on the earth's surface.
2. atmospheric environmental pollution factors
at present, the increasingly serious environmental pollution has become a major global problem, and it is also one of the main factors leading to global warming. Now, the research on global climate change has clearly pointed out that the temperature of the earth's surface has started to rise since the end of last century.
3. Deteriorating factors of marine ecological environment
At present, the change of sea level is on the rise. According to the prediction of relevant experts, the sea level may rise by 5cm by the middle of next century. If measures are not taken, it will directly lead to the destruction and pollution of fresh water resources and other adverse consequences. In addition, a large number of toxic chemical wastes and solid wastes produced in land activities are continuously discharged into the sea; Major oil spill events in seawater and the destruction of coastal ecological environment caused by human activities are the main factors that lead to the destruction of seawater ecological environment.
4. Land erosion, desertification and other destructive factors
5. Factors of sharp decline of forest resources
Worldwide, the forest area is being sharply reduced due to natural or man-made factors.
6. Hazard factors of acid rain
The impact of acid rain on the ecological environment has attracted more and more attention all over the world. Acid rain can destroy forests, acidify lakes and endanger living things. At present, acid rain in the world is mostly concentrated in Europe and North America, most of which occur in developed countries and some developing countries, and acid rain is also occurring and developing rapidly.
7. Factors of accelerated extinction of species
Life on earth is a valuable resource for human beings, and the diversity of life is the basis for human survival and development. But at present, the biological species on the earth are disappearing at an unprecedented rate.
8. water pollution factors
according to the water quality monitoring project of the global environmental monitoring system, about 1% of the monitored rivers in the world are polluted. Since this century, the water consumption of human beings is increasing sharply, and the scale of water pollution is also expanding, which has formed a pair of contradictions between the supply and demand of fresh water. Thus, the treatment of water pollution will be very urgent and important.
9. Toxic waste pollution factors
The increasing toxic chemicals not only pose a serious threat to human survival, but also will bring harm to the ecological environment on the earth's surface.
1 Changes of the Earth's Periodic Orbit
The Earth's Periodic Orbit changes from elliptical to circular, which is closer to the sun. According to a scientist's research, the temperature of the earth has been alternating between high temperature and low temperature, which has certain regularity.
The harm is that
global warming will reduce global agricultural production. The reasons are as follows: global warming will prolong the growth period of crops in colder high latitudes and increase the output accordingly. However, the increase of temperature will also increase the extreme weather in mid-latitude areas, increase the evaporation of the surface, decrease the groundwater level and aggravate the drought. Rising temperature will aggravate the high temperature and summer drought at low latitudes. All these will lead to a decline in grain production in the middle and low latitudes. However, the main grain-producing areas in the world are distributed in the middle and low latitudes, and the cultivated land area in the high latitudes is limited, so the increased grain output in the high latitudes is far from compensating for the reduced grain production in other regions.
global warming, the south Pacific island is about to top. Global warming has caused the Antarctic and Arctic ice sheets to melt rapidly, and the sea level has been rising continuously. According to a report of the World Bank, even a slight sea level rise of one meter is enough to cause 56 million people in developing countries to become refugees. The world's first inhabited island submerged by seawater is about to come into being-Katry Island, located in Papua New Guinea, a South Pacific country. Now the main roads on the island are waist deep, and all agricultural land has become rotten mud.
malaria is rampant in farmland. The people of Katerina Island, who wear traditional costumes and have always been happy in know life, have been independent for hundreds of years and have always maintained a traditional lifestyle. However, they are facing the fate of being submerged by the sea due to global warming caused by human destruction of the environment. Paul Tabasi, an environmentalist on the island of Katrina, said:' They have been continuously attacked by ocean forces, and there have been continuous floods. The original areas have been changed and destroyed, and almost all places have been submerged by seawater. At present, the original main roads on the island are now waist-deep, and the farmland where coconut trees were originally planted has all become rotten mud. What's worse, mosquitoes and flies are swarming and malaria is rampant. Experts predict that in a few years, Katry Island will be completely submerged in the sea, and it is imperative for the residents of the whole island to move to the village and evacuate.
the Amazon rainforest in the Amazon is gradually disappearing. The Amazon rain forest, the largest tropical rain forest in South America and the world, is gradually disappearing, making the global warming crisis worse. The Amazon rainforest, known as the lung of the earth, covers 5% of the earth's surface and produces 2% of oxygen and 3% of biological species in the world. Due to illegal logging and reclamation, the Amazon rainforest is disappearing with an area of 7,7 square miles per year, which is equivalent to the size of New Jersey. The disappearance of the rainforest will not only aggravate global warming, but also make many creatures that can only live in the rainforest face the crisis of extinction. In the past 4 years,
About the environmental problems in Beijing
The reason that it doesn't snow in Beijing this year is that snowfall is determined by several factors. In addition to cold air going south, water vapor is also needed. From the perspective of Beijing, water vapor mainly comes from two channels. One is the water vapor brought by the southwest warm and humid airflow from the south of the Yangtze River, especially the snowfall, which often has the characteristics of large snowfall and long snowfall time, and often becomes the main factor of snowfall in Beijing; The other source of water vapor is the water vapor brought by the easterly airflow from the Bohai Sea and the Yellow Sea. However, due to its short transport length, its snowfall is characterized by a small amount of snow. The warm and humid airflow in southwest China mainly comes from the Bay of Bengal, and the atmospheric circulation in this winter is somewhat abnormal, which makes it difficult to transport water vapor from the Bay of Bengal to mainland China. In addition, the continental monsoon controls Beijing in winter, and the continental monsoon is relatively dry and the water content in the air is low. The cold air that affects China this winter is more frequent, and its path is east-north direction. Except for the northeast, the air flow in most parts of China is mainly northwest, that is, the atmospheric circulation prevails in mid-latitude areas, and the northwest air flow is not easy to form rain and snow weather in downward flow.
Historically, the winter precipitation in Beijing has not been large, and the precipitation from December to February of the following year is usually about 1 mm, so it cannot be said that there is no precipitation in winter. Tracing back to history, the last winter with almost no precipitation was in 197. However, since October 24, 28 this winter, there has been no precipitation in the urban area, which is really rare. Since December last year, there have been four cold waves sweeping the city, but all of them are mainly cooled by strong winds. The northwest wind prevailed in Beijing this winter, which is not conducive to the transportation of these two streams of water vapor. However, the easterly wind or southwesterly wind, which is occasionally formed through the change of atmospheric circulation, has basically not been formed this year, so the water vapor transportation has basically been broken.
At present, most climatologists believe that global warming will cause an increase in extreme weather. With global warming, the frequency of extreme weather is increasing, but how global warming affects the appearance of extreme weather and what is the inevitable relationship between them is still an unsolved mystery.
With regard to dust storms, if the drought continues, the precipitation is unusually low, and the soil loses moisture quickly, it is very likely that after beginning of spring, the number of spring dust storms in northern China will increase accordingly, and Beijing is no exception. Moreover, the temperature in the northern region is high and the air pressure is low. Once strong cold air strikes, the horizontal air pressure gradient force increases, causing windy weather, which is more likely to lead to dusty weather.
In addition, according to folk proverbs such as "It doesn't snow when it's cold, and the fields crack when it's hot", it's possible that there will be a drought in Beijing this summer, but now the global climate is abnormal, so it's hard to tell how.
the warming of the earth has changed the earth in many aspects, and some of the changes themselves will also inhibit the warming trend of the earth.
firstly, the global warming makes some ice and snow on the earth melt, and the total amount of global liquid water increases. However, the specific heat of liquid water is higher than that of ice and snow. The increased heat due to the greenhouse effect does not significantly increase the temperature of water because of the increase in the total amount of liquid water on the earth. Although the increased heat due to the greenhouse effect significantly increases the temperature of rocks and land on the earth, it does not significantly increase the temperature of the whole earth because of its heat exchange with liquid water on the earth, which offsets the greenhouse effect to some extent and delays the melting of ice and snow on the earth.
Secondly, the warming of the earth makes the green plants on the earth grow vigorously, and their photosynthesis absorbs more carbon dioxide (the main part of greenhouse gases) than before the warming of the earth, fixing a part of greenhouse gases, so that this part of greenhouse gases no longer prevents the heat on the earth from radiating outward, which also offsets the greenhouse effect to some extent.
global warming increases the total amount of liquid water on the earth, and green plants absorb more greenhouse gases, which in turn delays the trend of global warming and is conducive to achieving balance. Of course, with the easing of the warming trend of the earth, the increment of liquid water and the absorbed main greenhouse gases on the earth are getting smaller and smaller. If the emissions of greenhouse gases such as carbon dioxide are not reduced, the earth will heat up again, causing a new round of total liquid water increase and the growth peak of green plants on the earth, which will delay the warming trend of the earth again. Therefore, without reducing the emissions of greenhouse gases such as carbon dioxide, the above equilibrium will be alternately formed and broken, so that the earth's temperature will fluctuate more than before, instead of increasing monotonously; If the emission of greenhouse gases such as carbon dioxide is reduced or fixed, the fluctuation of the earth's temperature can be calmed down.
The forests in the world are mainly divided into three types: cold zone (northern) forests, temperate zone forests and tropical forests. According to experts, today's forest ecosystem was gradually formed after 8 years of evolution of nature. Today, all virgin forests have become the target of large-scale exploitation and utilization by logging industry. In the tropics, many forests that are now gone have been cut down in the past 5 years. From 196 to 199 alone, more than 45 million hectares of tropical forests were swallowed up, accounting for 2% of the total area of tropical forests in the world; Millions of hectares of tropical forests have been degraded by logging, farmland reclamation and mineral exploitation.
Moreover, illegal logging and illegal trade in timber products continue to intensify all over the world, especially in developing countries with tropical forests and countries such as Russia, where government enforcement is weak. The demand for cheap wood products in the international market has further worsened this situation.
According to the climate model, the Intergovernmental Panel on Climate Change predicts that the global temperature will rise by about 1.4 ~ 5.8 degrees Celsius (2.5 ~ 1.4 degrees Fahrenheit) by 21. According to this forecast, the global temperature will change dramatically, which has never happened in the past 1, years, thus bringing a potentially significant impact on the global environment.
Our Appeal To protect our common homeland, please save every drop of fresh water.
in order to protect our common home, please plant more trees to slow down desertification.
in order to protect our common home, please don't use the convenient bag again.
in order to protect our common home, please don't throw waste batteries at will.
in order to protect our common home, please reduce carbon dioxide emissions.
in order to protect our common home, please take good care of flowers and trees.
in order to protect our common homeland, please actively promote environmental protection.
in order to protect our common homeland, please protect our common homeland.
◎ Food:
First, on April 22nd, Earth Day is a vegetarian day. (Animal husbandry consumes a lot of grains and beans, and also consumes a lot of precious water; In order to graze cattle and raise pigs, the virgin forest is sacrificed, resulting in the temperature room effect.
second, eat less (cooking at home, eating out in just the right amount, so you can't finish it and pack it home)
third, fast for one day (experiencing the taste of environmental protection in the body)
fourth, refuse to use styrofoam, and ask buffet restaurants or coffee shop to use paper cups (styrofoam is a carcinogen, and it also destroys the ozone layer that protects the earth. Styrofoam cups and buffet plates that drink coffee are still rubbish after hundreds of years, and continue to pollute the environment.
5. Refuse to buy alpine tea and high-cold vegetables (alpine tea and high-cold vegetables make forests in Taiwan Province disappear, destroy soil and water conservation in mountainous areas, fail to play the function of storing water, and use pesticides and fertilizers in large quantities, polluting the ecology of water sources and reservoirs).
◎ Clothing:
First, know the source of clothing material: 1. Only by purchasing natural materials (organic) such as natural cotton and hemp can it be recycled. 2. Buy and maintain clothes according to the washing label to prolong the life of clothes.
second, the demand is determined by four factors: the number of laundry, the capacity at home, lifestyle and economic situation. Try to control it as well as possible, and don't overdo it (quality over weight).
3. Tips for wearing old clothes newly:
1. Self-awareness: consideration of posture, skin color and lifestyle.
2. Find out the key points of fashion, such as length and color. Generally, simple and good cutting (three-dimensional cutting) can best show the interactive relationship between people and materials.
3. Accessories, such as scarves, pins and belts, are small, varied, effective and easy to collect, and a small amount of clothes are reliable accessories to highlight the effect of dressing art.
◎ Living:
First, use more second-hand furniture (whether buying a house or renting a house, using more second-hand furniture can not only recycle and save resources, but also help each other and enhance interpersonal friendship if a flea market for regular second-hand goods exchange can be held in offices, communities and the Internet).
second, use planting and greening to make home layout (don't make excessive decoration layout at home, it should be simple and natural. Home decoration does not necessarily need artificial materials, so it is better to use ecological natural materials. Potted plants with a variety of flowers and plants, try to use native tree species, leave more natural soil in the courtyard at home, and use less cement or hard pavement).
Third, please use utensils to hold water, wash fruits and vegetables, dishes, brush your teeth and wash your face, so as to save precious water (China is the 18th water-deficient country in the world. At present, South Taiwan Province has fallen into a severe drought, but our current water demand has reached the standard of 1 years of the Republic of China. At present, the propaganda policy of saving water in France is to take a bath once a week. If our water consumption continues to deteriorate, we will face the same situation.
4. Centralized use of power and air conditioning in rooms (try to turn on an air conditioner in one room as little as possible, and try to concentrate on it when there are few people.