Global warming and “urban heat island” raise temperatures in cities

Thanks to global warming and “concretization,” temperatures in large cities could rise by 7 to 8 degrees Celsius by the end of the century, according to scientists. These projections of temperature rise in cities represent the worst-case scenario, based on the retention of existing trends in greenhouse gas emissions or the greenhouse effect.

An increase of about five degrees Celsius is attributed to global warming, while the rest is due to “urban heat island” or “replacement” of city parks and lakes by asphalt and concrete, making cities feel warmer than their environment, according to Nature Climate Change.

Leading author of the study, Francisco Estrada, from the Institute of Environmental Studies in Netherlands, says the forecast refers to the world’s largest cities.

“Such an event would have enormous consequences for people’s health and energy consumption,” Estrada said.

Cities occupy only one percent of the Earth’s surface, but consume 78 percent of global energy and produce 60 percent of the total emissions of harmful gases.

For the study, Estrada and his team analyzed data of the world’s 1,692 largest cities and the temperature rise in them from 1950 to 2015.

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