Where is the cleanest air? Detailed answer

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Where is the cleanest air? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

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Where is the cleanest air?

In Antarctica. In the cold transparent air of this continent, normal speech can be heard for 2-3 km. Antarctica (13,4 million km²) more than Europe (10,4 million km²) or Australia (7,7 million km²).

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

How to determine air temperature by the frequency of cricket chirping?

The sounds of crickets are caused by the friction of their wings or legs against each other - this is how males call females. By the frequency of chirring, you can determine the temperature of the air. To do this, you need to count the number of sounds in 25 seconds, divide by 3 and add 4 to the result - you get the temperature in degrees Celsius. The formula works correctly only above 10°C, because at lower temperatures crickets are rarely disposed to love games.

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In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

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Robot vegetable grower Dragonfly with laser weeding 19.01.2024

Swiss startup Caterra has unveiled a new robot, Dragonfly, that independently navigates vegetable fields and uses lasers to effectively control weeds. This technological breakthrough promises to reduce the high cost of manual weeding, which costs vegetable growers significant labor and financial costs.

The Dragonfly robot promises to revolutionize agriculture by providing an effective and technologically advanced weed control solution that will ultimately improve the productivity and efficiency of farming operations.

In organic carrot fields, hand-weeding crews spend between 80 and 350 hours per hectare, depending on the severity of weed infestation. Not only is it expensive, but it also requires a lot of manpower at the same time.

Dragonfly, weighing less than 100 kilograms, is equipped with electric motors and four massive bicycle wheels, and uses GPS technology for orientation. The robot is equipped with cameras to recognize weeds and a laser that precisely destroys unwanted plants. At the moment, the speed of the device is limited, but the team of engineers is constantly improving the algorithms, trying to achieve weeding one to two hectares per day, including at night.

It is important to note that the use of laser is minimally harmful to only 1-2% of carrots.

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Vegetable growers are showing great interest in this unique laser labor method, offering their fields for testing. The more test areas available for photography, the more effective the robot's learning algorithms are.

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