Greening cities will protect against global warming. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Greening cities will protect against global warming

08.10.2022

Scientists from Yale University have figured out how to reduce the negative effects of global warming.

The more green spaces and street trees and rain gardens in cities, the more they manage to mitigate the effects of the climate crisis and global warming. Scientists from China and the United States came to this conclusion after analyzing satellite data from 2000 cities. They also found significant differences in temperature between cities and rural areas nearby, which was associated with heating systems. The analysis period was from 2002 to 2021.

The study found that cities warmed by an average of 0,56°C per decade during the day and 0,43°C at night. By comparison, rural areas warm on average 0,4°C per decade during the day and 0,37°C per decade at night. This means that urban areas are warming 29% faster than rural areas.

In order to level this difference, cities need to be greener more actively. Tree planting, which replaces exposed concrete and asphalt surfaces with natural vegetation, reduces the rate of warming in cities, which creates a cooling effect, especially at night, by capturing some of the heat from the surrounding surface.

<< Back: Bionic pancreas 09.10.2022

>> Forward: Pills instead of sports 08.10.2022

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

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. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

The threat of space debris to the Earth's magnetic field 01.05.2024

More and more often we hear about an increase in the amount of space debris surrounding our planet. However, it is not only active satellites and spacecraft that contribute to this problem, but also debris from old missions. The growing number of satellites launched by companies like SpaceX creates not only opportunities for the development of the Internet, but also serious threats to space security. Experts are now turning their attention to the potential implications for the Earth's magnetic field. Dr. Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics emphasizes that companies are rapidly deploying satellite constellations, and the number of satellites could grow to 100 in the next decade. The rapid development of these cosmic armadas of satellites can lead to contamination of the Earth's plasma environment with dangerous debris and a threat to the stability of the magnetosphere. Metal debris from used rockets can disrupt the ionosphere and magnetosphere. Both of these systems play a key role in protecting the atmosphere and maintaining ... >>

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Random news from the Archive

Foam alternative 23.02.2021

Thermoboxes for food, cooler bags for soft drinks, isothermal containers for transporting medicines - all these and similar containers are made of materials that do not allow the products placed in them to change their initial temperature. And most often, polymers such as polystyrene foam and expanded polystyrene (styrofoam) are used as insulation.

A lot speaks in their favor: they have good thermal insulation properties, weigh very little, are highly durable, and withstand heavy loads. But all these advantages are covered by a significant drawback: expanded polystyrene and polystyrene are not biodegradable, and their waste, which can decompose into thousands of small particles, greatly pollutes the environment. Scientists at the Institute for Natural Materials Processing Technology at the Technical University of Dresden have come up with an alternative to them by creating a biodegradable insulation material from ... waste paper.

Scientists subjected scrap paper to special drying. This process resulted in the formation of fibrous-based insulating elements. The task of the researchers was to regulate the process of preparatory processing of raw materials and develop special formulations of fibrous materials - so that, as a result, the fibrous mats that form the basis of the insulating material had a very low density with a fairly close distribution of pores in size.

In this way, an optimum quality level of the insulating material was achieved. In general, a lot speaks in favor of cellulose, on the basis of which paper is made. In particular, it is durable and has a very low thermal conductivity. This means that the environmentally friendly fiber mats developed by Dresden scientists are superior in their properties to many other insulating materials - including polymers such as polystyrene foam and expanded polystyrene.

The quality of the insulating material made from recycled materials is so high that the containers in which it is integrated can be used even for transporting food. In addition, according to the Dresden scientists, the packaging they have developed is a completely recyclable product. Yes, the new insulation material is not entirely recycled paper. It also has a layer of polyethylene film. However, since its share is negligible - it is only 7 percent - the packaging can be disposed of as waste paper after use.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews