In today's world, there are many opinions on the relationship between cities and carbon sources. Cities, where people gather, are prosperous, and everything is bustling. Industry and commerce converge, cars and horses are noisy, energy is widely used, and carbon emissions are also high.

In the city of Fu, there are many buildings, and their construction also requires countless materials, and the materials are fired, which can consume a lot of carbon and overflow. And the people live, the warmth depends on electricity, and the coolness depends on fans and air conditioners. All need energy, and the source of carbon flows here.

Furthermore, when traveling in the city, the traffic is Ma Long. Or for the convenience of private riding, or for the circulation of goods, fuel cars, spit carbon gas, fill the streets. In the industrial area, equipment roars, chemical smelting and forging, and carbon escapes day and night one after another.

Of course, there are also those who think about it. Although cities are where carbon sources are, they also have the ability to change. People today are gradually understanding the importance of ecology. In cities, they are promoting clean energy, photovoltaics, and wind power, which are gradually rising; advocating green travel, walking cars, bicycles, and rediscovering the road; they are also building gardens, planting plants and trees widely, and absorbing carbon and oxygen to slow down the trend of carbon accumulation.

Cities are solid carbon sources, but if everyone is single-minded, seeking reform strategies and improving measures, it is also expected to reduce the amount of carbon, turn turbid into clear, and restore the ecological environment, while seeking long-term benefits.