Saturday, September 25

Cold asphalt reduces temperature of cities | Digital Trends Spanish

It is known that, until now, asphalt in cities causes the temperature of these to increase. But a new study from the Massachusetts Institute of Technology reveals that the material called cold asphalt it would effectively reduce the temperature, which could be very useful in times of climate change.

The study indicates that it is possible to reduce the air temperature by about 2 degrees Celsius (35 degrees Fahrenheit) in cities like Boston and Phoenix. For this, it is necessary to use a lighter paving, since it is more reflective in sunlight. In contrast, darker paving reflects less light, concentrates more heat and raises the air temperature.

However, it is not to reach and cover all the streets of the city with a clearer pavement, but rather studies must be carried out that consider the distribution of the population and the different types of buildings that exist in a city.

One of the researchers explains that, for example, cold asphalt may reduce the need for air conditioning in the summer, but could also increase its use during the winter due to the lower temperature.

(Christian Petersen / Getty Images)

The scientists also used an artificial intelligence system to find out exactly what kind of material is needed in the various areas and neighborhoods of cities. And they discovered that, although cold asphalt is useful to reduce the temperature, each city needs a different composition of the material to use.

Beyond all factors, the study concludes that cold asphalt is undoubtedly a contribution to reducing urban temperatures, in addition to reducing carbon dioxide emissions: in Boston, these could drop by as much as 3 percent over 50 years, while in Phoenix they would do so by up to 6 percent in the same period.

And precisely cities like Phoenix have already carried out their own pilot programs, applying cold pavement to various places in the city and collecting data regarding the impact not only on temperature, but on structures and people in general.

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