If you have ever been Expelled from this country to enter the city and marvel at how amazing the heat is, you have heard how the joy of urban warming. The streets and buildings of the big city absorb solar energy during the day and emit it slowly at night. Built-up area they cook for themselves, and temperatures can rise as high as 20 degrees Fahrenheit above the surrounding country, which benefits from the many “sweat-soaked” trees, releasing water vapor and cooling the air.
As global warming rises, scientists, governments, and even human rights activists are seeking ways to tackle the tropical island. According to World Health Organization, The number of people exposed to tropical cyclones rose by 125 million between 2000 and 2016. Extreme heat kills Americans more than any other natural disaster, and it is especially dangerous for people with pre-existing conditions asthma.
By 2050, seven out of ten people will live in cities, says a International Bank. They will be more and more people. “I see cities as a kind of canary in the form of coal mines, where you have a glimpse of what the rest of the world is experiencing,” said Portland State University climate meteorologist Vivek Shandas, who has studied island temperatures in more than 50 US cities.
Shandas research has shown that even in cities, some areas can be hotter than 15, and its recipes vary in economic terms. The main indicator of global warming is the green environment. The rich areas of the city have green leaves, as well as poor portions have a lot of concrete; it grows well, and is filled with supermarkets, highways, and factories that absorb solar heat. Concrete surfaces are ideal for heating, especially, for overnight heating. When the sun rises, the poorer area is already warmer than in the rich.
Scientists are just beginning to figure out how to reduce the heat in city buildings by building roofs, walls, and paved streets. Lights reflect more sunlight than darkness. (Think about how you feel when you wear black instead of white on a hot day. This power of albedo is one of the reasons why Arctic extreme heat.) But when thermodynamics are straightforward, the delivery of cold temperatures becomes surprisingly difficult.
Take on the problem of cold roofs, says naturalist George Ban-Weiss, who studies architecture at the University of Southern California. Ideally, it is easy to draw large, large tips of white or white commercial buildings. Homeowners can choose bright tires, because the old clay shines better. These modifiers must cool the air from the roof, as well as its design, meaning that occupants will not have to drive steering frequently. If the house were to carry heavy loads, the homeowners could build a garden on a thatched-roof terrace, which would cool the entire area by evaporating water vapor.
But while these changes may make life more difficult for people living in every home under change, if the owners follow suit, in some areas they may have unintended local consequences. In a coastal city like Los Angeles, city temperatures often differ from the sea temperature, a variation that results in a reliable marine atmosphere. As the temperature of the earth and the sea draws closer, there may be less wind. “As a result this means that less fresh air is entering the city, which could make the worst-affected areas higher,” says Ban-Weiss, as well as air pollution that causes people to cool down.