Carbon dioxide emissions related to human life expectancy

A Stanford scientist for the first time published a direct relationship between the rate of atmospheric carbon dioxide and the increasing human mortality. He used sophisticated atmospheric modeling to combine physicochemical processes in the environment to obtain this result. The study was published as soon as the Environmental Protection Agency (EPA) did not allow some states in the United States to establish their own greenhouse gas emissions regulations because there was not enough evidence to show the effects of gas. Carbon dioxide emissions are related to people's health.

We have long known that carbon dioxide emissions also contribute to climate change. According to an article by Mark Jacobson, a professor of environmental and civil engineering at Stanford, the new study shows how carbon dioxide has raised the temperature to steps, and annual air pollution still causes thousands of deaths and more cases of asthma or respiratory disease in the United States. Every year worldwide 20,000 people die every time the temperature rises by a step, sometimes because of greenhouse gases.

Jacobson's article, published in Geophysical Research Letters, says: 'This is a causal relationship. The study first separates the effects of carbon dioxide on the impact of other factors causing global warming; At the same time, a change in meteorological and chemical changes caused by carbon dioxide alone increases the number of deaths. The reason is that ozone gas, molecules and carcinogens in the air increase. '

(Photo: iStockphoto / Karl Dolenc) According to Jacobson, research is directed specifically at California. The effect of warming due to carbon dioxide is most evident in densely populated areas. With 6 out of 10 US cities having the poorest air quality in the area, California is suffering from a disproportionate burden of the ongoing death toll without any measure to limit it. carbon dioxide emissions

On December 19, 2007, the EPA refused to allow California and 16 other states to set their own standards for carbon emissions. EPA is based on the absence of a special situation to bring these states into the exception list.

Stephen L. Johnson, an EPA manager, said that California's proposal was not accepted because it was not convincing enough to prove its abnormal status. The published studies focus only on the global consequences of greenhouse gases in general and pollution, not people's health. EPA said: According to the Clean Air Act, it is necessary to prove that there is a specific type of contaminant that is harming the health of the American people, so it has made the regulations to control it.

Jacobson's article offers a concrete evidence of California facing a catastrophic problem if carbon dioxide emissions continue to rise. California has 6 of 10 most populous cities in the United States, only that alone creates a different condition from other states. The consequences of health-related carbon emissions are most noticeable in areas that are already significantly contaminated. Therefore, warming caused by carbon dioxide will damage the health of people in these cities at a much faster rate than any other city in the United States.

Of the 1,000 deaths that increase each time the temperature rises a step caused by carbon dioxide, more than 30% of deaths in California, where the population accounts for 12% of the US population. Thus, the impact of carbon dioxide on the health of Californians is still higher than the whole country.

Jacobson also added that most Americans have been directly affected by climate change through the air they inhale for decades. Therefore, health effects will be worse if the temperature continues to increase.

Unlike previous studies, Jacobson used a computer model of atmospheric analysis to track the effects of climate change and air pollution that have not been mentioned. The model he designed himself 18 years ago is considered the most complex and complete model in the world. It combines the principles of emission, transport, production and evolution of gases and molecules in the atmosphere, plus the soil and ocean cycles, the atmospheric effects of rain, sunshine, wind, cloud, temperature and other factors.

In the study, Jacobson used a computer model to analyze the proportion of air in the air and ozone gas due to the increased rate of carbon dioxide and the resulting temperature rise.Ozone is also the cause of respiratory, cardiovascular and asthma diseases . Many studies also suggest that increased ozone gas increases mortality. Jacobson said: 'Ozone is a corrosive gas, abrasives rubber, statues and cracks tires. So you can imagine what it will do with our lungs when it reaches enough concentration in the air. ' He explored the impact of carbon dioxide globally and in the United States by modeling the changes created when considering the emissions of molecules in nature and man-made compared to the study of waste emissions. all kinds of man-made carbon dioxide gas emissions.

He also calculated the impact of rising temperatures on pollution. Two important impacts are considered:

1. The increased temperature caused by carbon dioxide increases the rate of ozone in urban areas.

2. Increasing water vapor due to carbon dioxide, accompanied by rising temperatures, also promotes ozone production even higher in urban areas.

Interestingly, both of these factors are not important if environmental pollution is low, which is typical of rural areas. Despite other factors such as high levels of organic gas emissions in plants affect ozone rates in less polluted areas. Organic gases also increase the amount of gas molecules in the atmosphere because they can chemically interact to create these gas molecules.

In general, places with high humidity, molecules become more dangerous because they will inflate when absorbing water.'Therefore, other gases can dissolve with molecules - including acid gases like nitric acid, sulfuric acid and hydrochloric acid , ' Jacobson said. The toxicity of these molecules which already pollutes the air is now increased.

Jacobson also found that the air temperature increased more rapidly due to carbon dioxide than ground temperature, altering the temperature profile vertically, reducing the dispersion of pollutants that only concentrated in places they are made up.

In the final part of the study, Jacobson uses a computer model to analyze the atmospheric variation in the United States along with proven health effects related to contaminants. mentioned earlier.

He said: 'By simulation can explain changes in ozone and molecules through chemical reactions, transport, clouds, emissions and other processes that pollute. Carbon dioxide certainly makes changes because it is the only gas that changes constantly. '

'Basically, you inhale larger amounts of harmful chemicals. The relationship between carbon dioxide and climate change for these gases is quite certain. The next step is to reduce carbon dioxide. Thereby reducing its consequences and improving the health of American people in particular and the whole world in general are suffering from health problems caused by carbon dioxide-related environmental pollution. '