Chinese and American scholars have developed new glass coatings that can be applied to windows to reduce room temperature

, the United Nations Intergovernmental Panel on Climate Change (
IPCC
) issued a report that said there was ample evidence that the Paris Agreement target of
2
degrees Celsius for controlled warming was no longer safe, let alone that warming could be as high as
5
degrees Celsius as current circumstances. In order to avoid greater negative impacts, humans should take more action to reduce emissions more quickly and limit global warming to

1.5 degrees Celsius in the

century.The United
plans to
a new agreement, the
Kigali Amendment
,
2019
. It will further strengthen the Green Advocacy Agreement, which "cuts" the use of gases that cause warming in refrigerators, air conditioners and other products around the world.even if the air conditioner no longer adds
CFC
), it will run up and consume electricity and emit a lot of hot gases, adding to the heat of the hot summer. Researchers at the Massachusetts Institute of Technology and the University of Hong Kong have developed a new type of window coating that they hope will automatically lower the temperature of their homes and reduce their reliance on air conditioning.this window coating remains absolutely transparent in environments below
32,
degrees Celsius, and automatically gives it a translucent texture like frosted glass when temperatures exceed this threshold. With this change, it is able to block up to
70%
solar heat and reduce room temperature and air conditioning loads.to minimize heat, the researchers inserted a large number of
500
nanometer diameter water-filled spheres into standard polymeric materials. At about
29
degrees Celsius, the sphere begins to contract, squeezing out the liquid and forcing the polyester closer together. This gives the glass a matte appearance, blocking heat while ensuring that enough visible light is still visible in the room.to test the material's role, the team created a small laboratory and irradiated it with a solar simulator. Under normal circumstances, the scorching of the solar simulator raises the room temperature to
39
degrees C, and after applying the insulation film, the room temperature drops to
34
degrees C. Researchers say that while this may seem unlikely, it will also significantly reduce the power consumption of air conditioners, thereby reducing coal-fired power pollution.the film is similar to a household cling film, so it can be easily applied to any window. "One of the biggest advantages of this research and development is the use of common materials, which increases the suitability of the product and makes manufacturing more difficult." "It's very important for us to be a professor of mechanical engineering at the University of Hong Kong, " said Nie Xiaobo, a professor of mechanical engineering at the University of Hong Kong. The researchers are also adjusting the formulation of the film to try to further improve thermal insulation. At present, the research results are still some distance from mass production and sales.to reduce room temperature by filming windows is just one of many studies in recent years. In

, Chinese materials engineers developed a new type of window coating that regulates temperature and generates electricity, according to media reports in July., a professor of materials and engineering at South China University of Technology, developed a coating that filters out infrared wavelengths while allowing light to shine and converts solar energy into electricity, the South China University of Technology reported. The material of this coating is much more complex and difficult to make than the "cling film" material mentioned above.This coating contains translucent photovoltaic cells that allow visible light to pass through the coating and filter out heat-capable infrared wavelengths, reducing the building's reliance on heating and cooling systems by
50%
, and allowing the building to get energy from the near-infrared light of the sun. Similarly, the results of this research remain at the laboratory level, far from mass manufacturing and production.