According to statistics, the world's land area is about 162 million square kilometers, accounting for 30.3% of the total area of the earth, but about one-third, that is, 48 million square kilometers, is arid and semi-arid desert areas, and it is expanding rapidly at a rate of 60,000 square kilometers per year.

Deserts already cover 20 per cent of the total land area, and 43 per cent of the land is threatened by desertification.

It can be said that deserts are one of the most serious crises facing humanity, like scars on Earth that are difficult to heal.

It's hard to manage a desert, at least for now.

At present, there is no feasible and mature technology for desert control in the world, and some experts in this field believe that it is possible to reply, and some experts believe that it is impossible to reply.

To control the desert, either the sand enters and people retreat, or the people enter and retreat, and it is difficult to make progress over and over again.

However, according to some data on the light brain, the desert problem will become one of the most serious crises affecting human survival in the next 100 years, even more serious than the global temperature change and global pollution.

Why.

Because in the next 100 years, there will be no major wars, disasters, and plagues, and the population will grow rapidly, but the land is limited, and the desertification will expand by more than 60,000 square kilometers per year, and there will be fewer and fewer places for human beings to live.

Therefore, desertification has risen to one of the crises related to the survival of mankind, and it is urgent to control the desert.

However, for more than 100 years, there has been no effective way to manage deserts.

Until, a spaceship, discovers a plant on a planet with signs of lower life.

This plant, which is very special, can grow on the surface of the planet equivalent to a desert environment, which is already very surprising.

So, the astronauts brought back some plant seeds and samples.

It was handed over to some botanists from the Academy of Human Sciences for study.

After research, this plant was discovered. Like the plants of the earth, they also need water and sunlight.

But because the plant grows on the surface of a desert-like planet that is sorely lacking, it has evolved a variety of favorable genes that are well suited to arid environments.

First, his rhizome is very long, and his root system is very well developed, and he is able to penetrate deep into the earth.

Article 2. It has a fleshy stem and has a strong water storage capacity.

Third, the leaves can be rolled up freely, and when the sun is direct during the day, the leaves are reflexed and rolled up. Reducing water evaporation, at night, when it is cold, the leaves stretch out and are able to absorb the free water vapor in the air and store it in the fleshy stems through the leaves.

Fourth, this tree is like many trees on earth. After planting a mother tree, the daughter tree is bred through the rhizome, and after a few years, an oasis can be formed in the desert, so this desert tree is also called the mother tree.

Fifth, and most particularly, the tree can bear some fruit. Because of the large temperature difference between day and night in the desert area, it can effectively store sugar and is very sweet, just like the cantaloupe in Turpan, Xinjiang.

After more than 100 years, this fruit is a very high-grade fruit, and the fruit produced by the mother tree is very rare. The taste is the sweetest, and it is designated as an A-grade fruit and mother fruit, which can be sold for thousands of yuan a catty, which is very rare every year. Specializing in top-notch restaurants, establishments, and the rich and powerful, ordinary people don't have this kind of taste.

The fruit of the sub-tree is more, and the taste is not as sweet as the fruit of the mother tree, which is designated as the B-grade sub-fruit, which is supplied to supermarkets and fruit markets, and is also sold for 5 or 60 yuan a catty, as a very high-end fruit, ordinary people can only taste it occasionally.

The mother tree also has a characteristic, watering and fertilizing are also very good for watering and fertilizing, because the desert oasis composed of a mother tree and a daughter tree, when watering and fertilizing, only the mother tree can be watered, and the mother tree transmits nutrients and water to each daughter tree through the root system.

Chen Dong checked the mandatory tasks that appeared after the level of the light brain system was upgraded to level 5.

Desert governance: Desert is one of the major crises related to human survival, deserts are like scars on the earth, these scars are expanding at a rate of more than 60,000 square kilometers every year, and it is urgent for human beings to control deserts.

Mission: Conquer the desert.

Reward: One Oasis + 10 points.

You are the green guardian of the earth!

Close the Force Tasks panel.

Open the built-in space chip of the optical brain to view the new things in the warehouse.

A bag of seeds for a mother tree, 1 point can be exchanged for one seed.

There are also solutions in glass bottles, dark blue, check the name of the solution, type R solution.

1 point can be exchanged for a mother tree seed.

Chen Dong checked the points, and there were still 218 points left.

Chen Dong clicked the exchange button, and then entered the quantity, 100.

Chen Dong exchanged the seeds of the Mother Tree and asked Xiao Lan, the assistant of the Light Brain, "How to use these seeds of the Mother Tree, can they be planted directly in the desert?" ”

Xiaolan replied, "Master, you must first cultivate the seeds of the mother tree into saplings, and then plant them in the desert, which is most semi-arid and not desertified, so that it is more beneficial to the growth of the mother tree." ”

Another point, I must remind the owner, if the owner does not want the second generation of seeds to grow the next generation of mother trees, I suggest that you exchange some R-type solution and put the seeds in it to soak it, otherwise, others can cultivate the seedlings like you as long as they hold the fruit seeds after eating the fruit. ”

Chen Dong looked at the R-type solution, and it took 12 points to redeem a bottle.

Chen Dong asked Xiaolan, "How many doses of solution do you need for 100 seeds?" ”

"2 drops, mixed with 0.5 liters of water."

"Can I redeem 2 drops?"

"No, at least one bottle."

"Okay then."

Chen Dong exchanged 1 bottle of R-type solution.

Chen Dong intends to cultivate the seedlings in the lawn area of the villa, where there is plenty of sunlight and dew.

100 seeds, Chen Dong plans to soak 95 seeds in the R-type solution, leave 5 seeds, do not soak, and make seeds.

Just do what you say.

Chen Dong first called the flower and tree potting shop to order more than 100 clay pots, and explained that he wanted to add flower and tree cultivation soil, and ordered more than a dozen for backup.

Then, take a washbasin and follow Xiaolan's prompts, first add half a liter of water to the washbasin, and then drop in 2 drops of R-type solution.

Leaving 5 seeds behind, dip the remaining 95 seeds in the washbasin, soak, and follow Xiaolan's prompts to soak the seeds for 1 hour.

After waiting for more than 1 hour.

When the more than 100 pots ordered, the staff of the potted plant shop unloaded the pots, and after settling the bill, they left.