Climate change is a change in the usual weather of a determined location. It also includes the raising or the dropping of temperatures. Climate can change dramatically over long periods of time, such as millions of years. Instead, the weather, that is influenced by the changes in temperature, can change day by day. Several articles show that climate change is affecting the earth every day in a different way. Some locations suffer the lack of water and food, others are influenced by natural disasters, such as in Florida with the hurricanes, other places are desert because precipitations are extremely rare. Nowadays, the real issue is that the earth's climate is radically changing in such a way that it is influencing humans' everyday life. The earth is warming up and the temperatures are rising. These factors are having consequences for the natural environment such as the melting of ice. This is influencing oceans' water levels that are rising every year. However, there are many other different factors that can cause climate change. The most evident and common are: pollution caused by humans driving cars and motorbikes, the heat coming from cooking and heating systems, burning energy from gases and oil coming from industries, and solar irradiance. Humans are guilty because they waste and spread a lot of chemical materials in the natural environment. 

Climate change occurs when the heat increases and decreases in the earth's atmosphere. The sunlight enters in the atmosphere and either the land or the oceans absorb it. Some of this heat is reflected back to space, around 30 percent, and it will not be absorbed by the earth's surface. The reflection and absorption of the sunlight can fluctuate as a result of human actions. The emission of gases coming from industries and transportation are one of the main causes why the climate is changing and the temperatures are warming up. The emission of gases, such as carbon dioxide, need to be controlled and managed because it influences negatively the environment, by ensuring the negative development of the greenhouse effect (Shilu). The greenhouse effect is a natural process that warms the earth's surface. During the day, the sun shines through the atmosphere and the surface warms up. At night, instead, the earth cools down and it releases the heat back in space. Some of this heat remains trapped in the atmosphere by the greenhouse gases. The main issue is that the greenhouse effect is very strong and the earth is not able to cool down during the night, so it gets warmer and warmer. Too much carbon dioxide and other greenhouse-gases, such as methane, are contributing to raise the earth's temperature. Another factor that contributes to heat the globe is the increase of radiation coming from the intense use of mobile phones and electronic sources. Some of these contain dangerous chemical elements, such as nitrogen oxides, that are harmful for human health (Peel). The writer says that these elements are unsafe components for the environment because they actively interact with global climate change by influencing air quality and "subsequent human health impacts." Examples of some adverse consequences for human health are: increase of illnesses, deaths due to the increased frequency of heat waves, body injuries, nutritional issues, and diseases. Also, the writer says that climate change "is expected to impact both anthropogenic and natural emissions" (Peel). For example, higher temperatures are increasing and they will impact emissions of air conditioning. 

 As the majority of scientists and experts in the environmental field claim, climate change is influencing the life of humans in a negative way. Climate change also affects human health because it leads to environmental issues and the spread of infectious diseases. Despite most of the population agreeing with the fact that climate change has negative consequences on human health, some people are skeptic or contrarian and deny this idea. They disagree with the fact that climate change is truly happening. They also reject the evidence of several textbooks and scientific researches. According to the writer Crank, there are some people that deny the temperatures are increasing and climate is changing. In the United States, for example, deniers do not help the country to respond to the issue with useful programs in order to improve the situation. In fact, prevention plans able to decrease global warming are not effective. This is because there are too many people that do not believe in science's ability to change wrong actions. These people think that the earth is not having issues with climate. So, they mainly criticize all the scientific evidence that claims that climate change is truly happening and influencing the everyday life of people. They basically think that climate change is a myth. In fact, according to their ideas, there will not be negative consequences or impacts on agriculture, health, sanitation, natural habitat, and other environmental aspects. Also, they claim that animals can adapt to climate change and they will not become extinct because of it. They believe this because in the past animals were able to adapt to small climate changes. The scientists see the actual situation as more dangerous for animals because they would not be able to react in front of the environmental obstacles.

Environmental issues are generally defined as problems with the planet's systems such as air, water, land etc.., that have interferences with human's life and their health. Some of these major issues are: pollution, global warming, and climate change. According to the writer Barrett, climate change has a huge impact on human health because it influences the availability of clean air, water, healthy food, and the spread of diseases. Climate change is also dangerous because it influences the weather of the earth. In fact, "changing climatic patterns are causing both droughts and floods" (Barrett). Usually, higher temperatures can cause insects to multiply more frequently and this can lead to the spread of diseases. This means that nowadays, the globe is more susceptible to have environmental natural disasters and strong storms. The writer also talks about epidemic diseases that involve cardiovascular issues such as blood pressure. These factors can lead to mental health impacts because climate change can: disrupt social, economic, and environmental conditions, personal experiences with extreme weather and health conditions, and finally emotional distress and anxiety about the future. 

In his article, "Panel's Warming on Climate Risk: Worst is yet to come," the writer Gillis explains a dangerous situation in which water supplies are influenced by heavy rains and heat waves. A heat wave is a type of weather that lasts generally long periods of time that characterize a specific location. These increase the risks that natural disasters occur in the future because of the frequent rise of temperatures due to climate change. Extreme heat events can be responsible for many deaths. The writer also explains that this risk can influence farmers because they will not be able to "keep up with the fast-rising demand for food." 

Climate change affects air, quality of water, food, sanitation, and weather, causing violent storms, rising sea levels, and heat waves. It also increases the risk that natural disasters happen more often than what people expected. According to the article of Worrall, natural events that are disastrous for humans' life are plagues, famines, heat waves, and epidemics. For example, the enormous volcanic eruption of Mount Tambora, in the Indonesian Archipelago, caused a decade of food crises and nutritional problems such as ingestion of contaminated water, gastrointestinal problems due to toxic food and drinks, and allergies. Epidemics, such as the bubonic plague in Europe, are very dangerous because they can lead to nutritional problems and lack of sanitation. In addition, climate change and quality of air are particularly related to each other. The bubonic plague was an epidemic that killed about 50 million people in the 14th century. It was atrocious because the population was infected in a quick period of time by fleas carried on rats. Climate change can contribute to the spread of the disease if the weather is hot and wet causing rats to die and fleas to look for a new host, which can be humans or domestic animals.

It is known that the massive gas emissions of human generators cause climate change and air pollution. Every region in the world reacts in a different way to climate change. Some of these are affected by heavy rains, others become more dry and have a lack of water or clean air, and many others are influenced by the lack of sanitation or the spread of infectious diseases through viruses or bacteria. Polluted air can contribute to climate change and can also be exacerbated by it. Burning fossil fuels release gases and chemical elements into the air, contaminating it. One of these gases is carbon dioxide that contributes to raise the earth's temperatures. Moreover, climate change increases the production of allergenic pollutants. These are the main causes for human allergenic disorders and asthma. 

An example can be shown through the huge use of transportation in small and big cities. Los Angeles is at the top in all the rankings demonstrating high levels of pollution because too many people drive cars. In the big cities, the level of smog and methane in the air is very high. Smog is a type of air pollution caused by the emission of gases coming from the internal combustion of the cars' engines. In the atmosphere, it reacts with the sunlight by decreasing its capacity to absorb and reflect the heat. The particles that reside in smog are dangerous for human health because they infect the bloodstream and trigger the asthmatic attacks. Despite many attempts and improvements, the city of Los Angeles has still over 1.47 million people living in unhealthy air counties. The primary goal for the future of the city is to reduce the use of cars and promote alternative ways of transportation such as bus, bikes, and hybrid cars.

Another contributor to climate change is the emissions of carbon dioxide or nitrogen. These chemicals are the most dangerous for human health. They are able to pollute the environment and decrease the capacity of the atmosphere to send the sunlight radiations back to space. China, for example, committed to decrease greenhouse gases by 2030. The plan "highlight[ed] environmental protection as a key priority" (Shilu 2). Economic leaders and the government of China are also planning to shift from a heavy consumption of polluting elements towards a cleaner friendly one. This article also analyzes the quality of food and its availability as a consequence of climate change. In China, the rising of temperatures and precipitations influence radically the agriculture and the food production (Shilu 2). Since it is a country based on production and a big economic industry, it is not easy to decrease the level of pollution because the industries have to work in order to produce enough quantity of materials and food to maintain the population. This means that the communities should be more aware of this situation and they should take action in order to decrease the amount of wasted water, food, and organic pollutants. 

Quality of water is also influenced by climate change. It impacts drinking water, primary uses or needs, recreation, and sanitation.  According to Gillis, the oceans are raising their water levels because of the melting ice coming from the Arctic and Antarctic poles. Also, he comments that heavy rains are intensifying, coral reefs are dying, and many creatures are migrating toward the poles or somewhere else where they can adapt. "The worst is yet to come", he says, because the risks of natural damages and accidents are higher and higher every year. Moreover, the scientists are trying to make people aware that negative consequences are happening right now when the news show hurricanes, flooding, and other catastrophes. The natural environment is getting stressed and it cannot handle this situation. For example, in the American west, the scientists noticed that mountain snowpacks are declining, "threatening water supplies for the region" (Gillis). 

Climate change affects the natural environment in such a way that it can influence human health either directly or indirectly. Precipitation patterns and changes in temperatures have direct consequences on human health. In fact, they can contribute to the spread of diseases such as malaria. These diseases are transmitted from little animals, such as mosquitos, to humans. Cholera is also another disease that influences both the environment and human health. It is caused by unclean water within the cities and towns ("Climate Change Adaptation and Health"). As a result of climate change, the demand of health services is increasing. Climate restricts where an infection can occur because it is able to limit the requirements through which the disease can be transmitted. For example, malaria can be found in Central and South America because the temperature is perfect for the insects to spread the disease. Now, due to the warming, malaria can also be spread over mountains in Africa. In India, climate change is influencing drinking water by contaminating it. This leads to water- borne diseases such as malaria, cholera, and dengue. These infectious diseases are also linked to demographic factors. In India, especially, the influence transmission intensity depends on temperature, humidity, and rainfall patterns. Also, urbanization and changes in land use, deforestation, and population growth are responsible for the resurgence and the spread of these diseases. Also, floods create an environment where many health consequences result positive for the disease transmission. 

Since the issue of climate change is affecting humans' lives either directly or indirectly, it is important that all the population is aware and agrees with this idea. According to the writer Bain, it is important to promote pro-environmental action programs for deniers in order to avoid judgments and bias. He thinks that: 

"People typically also want to live in a society with strong societal development (for example, scientific progress and economic growth) and minimal dysfunction (for example, crime and poverty). We predicted that deniers may be motivated to engage in pro-environmental action where they think climate change action would result in people becoming more moral, interpersonally warm and competent, and where action would lead to greater societal development or reduced societal dysfunction."

In conclusion, climate change is influencing the life of humans and it is having negative consequences on their health. Climate affects the quality of food, air quality, clean and drinking water, and agriculture. It also contributes to spread infectious diseases and creates environmental disasters, such as hurricanes and dangerous storms. In China and in big cities such as Los Angeles, the level of pollution is so high that people are getting ill. This happens because of the exaggerated use of cars that produce smog. Since the Chinese industries are among the most developed and important for the world's economy, they are obligated to burn an enormous amount of gases. These are dangerous for human health and for the environment. It is fundamental that the whole population decides to act in order to improve the situation before it gets too late. The risks are so high that animals are already moving around the globe and changes in temperatures are causing natural disasters such as hurricanes and violent storms. This is showing how climate change is influencing negatively not just humans, but also the environment. If we do not act, the consequences can be catastrophic for the earth's future. 
