Does the ecological catastrophe have to be man made?

It's not!This is an absolute view. There are two reasons: one is natural and the other is man-made.

Urban exhaust pollution, such as too many cars, exhaust gas seriously affects urban air, resulting in an increasing number of urban diseases and asthmaThe digging of diversion canals has led to a poor water supply chain, caused a large number of animal deaths, spread germs, and threatened human health.

Ecological Disaster Manifestations:

Ozone layer depletion:

The ozone layer is a layer of air with a high concentration of ozone in the upper atmosphere, which can prevent excessive solar ultraviolet rays from irradiating the earth's surface, effectively protecting the normal growth of all organisms on the ground. The destruction of the ozone layer is mainly achieved by the chain reaction of the atomic chlorine produced by the decomposition of the chemical freon, which is widely used in modern life, into the stratosphere and decomposed under the action of ultraviolet rays.

Recent studies have shown that ozone levels in the stratosphere between 15 and 20 km above Antarctica have been reduced by 40 to 50 per cent, and at some altitudes, ozone losses can be as high as 95 per cent. Ozone depletion also occurs in the stratosphere of the Arctic.

The destruction of the ozone layer will increase the radiation intensity of ultraviolet waves. According to the statistical analysis, the ozone concentration decreased by 1%, the incidence of **cancer increased by 4%, and the occurrence of cataract increased by 0 6%. By the beginning of this century, the ozone layer over the middle of the planet had decreased by 5 to 10 percent, increasing the number of cancer patients by 26 percent.

Greenhouse effect: suffocating greenhouse gas emissionsThe greenhouse effect refers to the phenomenon of carbon dioxide, nitrous oxide, methane, and freon emitting large amounts of high-temperature greenhouse gases into the atmosphere, causing global temperatures to rise. Currently, the world emits about 23 billion tons of CO2 into the atmosphere every year.

20% more than at the beginning of the 20th century.

It is still increasing at a rate of 0.5% per year, which will inevitably lead to global warming, destruction of ecosystems and rising sea levels. According to relevant statistics**, global sea level will rise by about 20 cm by 2030 and 65 cm by the end of this century, seriously threatening low-lying islands and coastal zones.

Ecological catastrophe refers to ecosystems.

The catastrophe that the balance has brought to society and humanity due to the disruption of balance. For example, the land is desertified due to uncontrolled land reclamation and uncontrolled deforestation.

The disaster that desertification brings to society and mankind is an ecological disaster. Disruption of the ecological balance.

The factors are natural factors and human factors.

Causes: 1. Natural factors: natural factors such as floods, droughts, typhoons, landslides, tsunamis, etc. The destruction of the ecological balance caused by natural factors is called the first environmental problem. The destruction of the ecological balance caused by human factors is called the second environmental problem.

2. Human factors such as sails: make environmental factors change. For example, blind land reclamation, indiscriminate deforestation, over-encirclement of water surface, and overloading of grasslands will deteriorate environmental quality, produce short-term or long-term effects, and make the ecological balance out of balance; Causes changes in the species of organisms.

In the ecosystem, the blind addition of a species to the slag hail has the potential to disrupt the ecological balance; Disruption of biological information systems. Organisms rely on information connections with each other to maintain their clustering and normal reproduction. The artificial release of certain substances into the environment may disturb or destroy the information communication between organisms, and may cause the ecological balance to be disbalanced or destroyed.

The ecological disasters that humanity is currently facing include global warming, leakage, and human deforestation

1. Global warming

As the seasons change, the ice sheet melts and solidifies. But the disappearance of permafrost is a much longer process. The coastal lands of the polar regions are under threat due to a number of factors.

The gradual increase in global temperatures has melted mud-rich permafrost deposits; It has increased the intensity of ocean storms, washed away sediments, and caused floods to erode large swaths of land.

2. Leakage

The world's largest ** spill was the 1 million gallons of oil that Saddam deliberately dumped in the Persian Gulf during the 1991 Gulf War. The oil dump caused the extinction of seabirds and fish. The danger of an oil spill has never really been estimated.

In 1989, the tanker Exxon Valdez hit a reef and spilled approximately 11 million gallons**.

The spill essentially destroyed the ecology of the Prince William Bay region of Alaska. Due to the remoteness of the Prince William Strait, clean-up was difficult.

3. The Brazilian Amazon rainforest has been severely damaged by human deforestation

Deforestation of the Brazilian Amazon rainforest has risen at an alarming rate over the past decade. Ranchers, ranchers and loggers destroy 10,088 square miles of rainforest each year, which is the size of Hampshire, England. More than 50% of the world's wildlife and 40% of the world's oxygen come from the Amazon.

4. Industrial mining in developed countries in developing countries brings hidden dangers to the environment

Both developed and developing countries rely on the mining of rare metals to boost their economies. But there can be a significant environmental cost. People dig pits above ground to extract the minerals they need, and soil erosion affects the surface and disrupts the ecological balance.

The ecology of the mining area is difficult to recover. For example, India's Sukendar Valley, which has 95% of India's chromite reserves, has turned it into one of the most polluted places in the world.

5. Overfishing

The variety of fish that humans have eaten over the past two decades has actually declined. Rising demand and declining demand have led to the complete extinction of bluefin tuna and cod in the North Atlantic and Mediterranean.

The document documenting overfishing in 2009 was called "The End". In addition to the regret that fish can no longer be cooked, the rupture of the chain of important marine life will affect the survival of human beings. The health and continued development of the ocean is a major driver of the world's climate, and it is the foundation of both marine and terrestrial food**.

The ecological disasters currently faced by human beings include climate and environmental changes, soil erosion, destruction of forest vegetation, and extinction of wild animals

1. Due to the expansion of the scope of human activities, the climate and environment, with the large emission of carbon dioxide, the melting of the South and Arctic ice sheets brought about by the greenhouse effect will lead to the rise of sea level;

2. Human activities, population growth, and land development have led to a significant reduction of forest vegetation, soil erosion, land desertification, and salinization.

3. The mass killing of wild animals by humans has accelerated the extinction of wild animals.

To sum up, the ecological disasters currently faced by human beings include climate and environmental changes, soil erosion, destruction of forest vegetation, and extinction of wild animals.

The ecological disasters facing mankind today include: air pollution; climate warming; White pollution (plastic), the rate of extinction of species is accelerating.

These disasters are of human own making.

Together. Am I Yang? In front of you, you can choose what you like, whether I will see you again in the end, is it using our own urban lifestyle?

I am yang, and I am providing us with someone who thinks you are good