Fan Jingjing's brows furrowed, she thought that these mosquitoes, flies, rats and other insects were actually the source of the plague.

However, in Chang'an City, although the garbage has been treated, people do not have a better disposal pipeline for the garbage produced in daily life than the countryside.

Nature is the best place to recycle, as long as the density of garbage is not high, it will not be hindered by nature's perfect recycling.

The rednecks don't deal with it because they don't have the time and the heart to deal with it.

Their time and mind are thinking about how to survive and live a little better.

But in a city, especially in a city as big as Chang'an, if you don't dispose of this garbage properly, the environment around you will become very bad and unsuitable for human survival.

Chang'an City, with the Tang Dynasty, has a very high population density and total population, although it is now less than a million people, but the population is increasing faster than the speed of buildings.

Although there are no high-rise buildings, in this era, when dealing with garbage and drinking water, it is obviously more scientific, and because it is difficult to obtain water resources, there is no way to achieve Fan Jingjing's cleanliness standards in daily life.

There are few places in Chang'an City that meet the drinking standards, although this is an ancient time without chemical pollution, but the garbage problem caused by a large population is also very serious.

Fan Jingjing knew that when the Tang people needed water, they had to go to various wells to draw water.

There is a very big problem in fetching water in the well, that is, in some places, the well water is very small, and even have to go to a farther place to be able to reach the level, if there is no strong man at home who can fetch water, for young women they can only get very little water at a time.

And for the convenience of getting water, many people don't pick up water at all and do laundry directly in the local area.

At this time, there is no laundry detergent, and other chemicals, and the dirty water from laundry can slowly become clean through precipitation.

But because they dump dirty water very close to the water source, it is easy to pollute the water source when it is used.

Urban life, starting over is not a simple problem, all aspects must be dealt with, one link after another, otherwise life will have a lot of twists and turns.

And there is no one way to solve all problems at once.

Until the age of science and technology, people are still constantly living in the city, suddenly discovering various situations, to think of a way, thinking of a way to think that it can solve all the problems, but new problems, will continue to occur.

Often at the end of the day, they find that what they are doing is a cycle, and the solution to things may often be something else.

There are some problems that people can grudge to endure and do not need to be reformed, but some problems can even lead to the death of human beings.

For example, the biggest garbage problem in the age of technology is born when people solve many problems in daily life.

Because plastic waste is very convenient for people's lives.

In Datang, as long as Fan Jingjing has no brains to pump, she will work hard to develop plastics to facilitate people's lives, and the problem of plastic garbage will not exist in her lifetime.

Most of the fish or vegetables that people use to pack and take away are not newspapers, but all kinds of large leaves and all kinds of straw ropes.

Even bowls at home.

It should be noted that the nature of various plants, some plants, which are harmful to people, and some plants, will be toxic when they encounter certain objects, and these plants must be studied, but it will be very difficult to study them, and they must be studied from various rules of thumb to study poisonous, or not poisonous, but the results of these studies are often the conclusions drawn with a lot of life.

Therefore, scientific research in ancient times was very difficult, and many people used life to study science, and then passed it on with memory or songs.

Fan Jingjing told herself not to think too much, think about some things that she can do now, for example, study the various substances in the human diet, whether they will conflict with certain plant leaves, and which ones can be better packaged.

These leaves that can be packaged, how much does it cost to produce, and how easy to obtain.

Experiments, can let the guinea pigs do the experiments, or the lives of certain nations that are destined to disappear to do the experiments, so that there will be no residual historical resentment, and the people who need to hate people are no longer there.

In this way, the life of the Han human will not be used for experimentation.

Many of the descendants of the Turks are still Han Chinese! In order for the Han people to finally be able to speak, many things should not be done now.

Moreover, it is related to the adaptation of human beings, and there are several animals in the last life, such as mice and pigs, which are similar to humans in some aspects, and can be used as a reference, and Fan Jingjing can tell these "common sense" to the researchers of Fanjia Manor.

Even if they can't accept it, the research can still be carried out.

What's more, Fan Jingjing's words can still produce some brain-dead followers in the hearts of the die-hard Fan family manor.

Small mice are the easiest to catch, but they are not necessarily guinea pigs, and they tend to have gray colors.

A guinea mouse, or a gray mouse. What's the difference, Fan Jingjing doesn't know, only knows, the guinea pig has never seen it, life is relatively clean!

However, it is said that voles that live in the fields can also be used as food for humans.

There are relatively few rat-eaters in this era, and it is estimated that there are not enough spices recognized at present, and many spices in later generations are still traditional Chinese medicine, which can be used as medicinal materials, and the value is still relatively high.

The rodent and mosquito control work in Fan's manor is nearing completion.

Fan Jingjing is very happy, every time the Fan family manor completes a major project, it represents a qualitative change in her quality of life.

In her daily life, she is not constantly disturbed by mosquitoes and flies.

At the same time, it affects the people who are in the same living area with her, and they are out of a kind of shadow of death and have a chance to live longer.

The entire Fanjia Town has planted a variety of anti-mosquito crops, and she also refines the tools that can be used to make anti-mosquitoes in later generations, and those that can be refined by natural methods.

It can enhance the greater anti-mosquito effect, so that they can take it away without bringing back the eggs of mosquitoes and flies from outside, which can create a little benefit to the life of the Fan family manor.

But Fan Jingjing doesn't know if mosquitoes will produce antibodies to these plants that have anti-mosquito effects, evolve into a new generation of mosquitoes, and some genetic changes will occur.

All in all, there is a group of people in the Fan family manor who are specifically studying how to improve hygiene, and perhaps they can be given a new task, which is to improve the hygiene of Chang'an.