Final answer:
The increase in reports on the harmful effects of diesel emissions on human health is due to more research revealing the correlation with illnesses and premature deaths, the growing use of fossil fuels, and urbanization that elevate air pollution levels. Technological advancements and regulatory efforts are combating these emissions, but complex relationships and global scale challenges still exist in linking changes in emissions directly to health improvements.
Step-by-step explanation:
The increasing number of reports regarding the detrimental impact of diesel emissions on human health can be attributed to several factors. Growing awareness and scientific research, such as a 2013 study by MIT showing that vehicle emissions are responsible for 53,000 early deaths per year in the United States, have shed light on the severity of the issue.
The health effects of air pollution, such as respiratory and cardiovascular diseases, cancer, and premature death, are becoming more evident. This is compounded by the fact that humanity's use of fossil fuels, coupled with increasing urbanization, is intensifying the stress on the earth's atmosphere. Moreover, air pollution not only affects human health but also crop quality and the costs associated with heating and cooling, leading to broader economic impacts.
While technologies such as diesel filters and alternative vehicle technologies like electric vehicles help reduce emissions, indoor air pollution remains a substantial source of poor health, especially in developing countries where solid fuels are used for cooking and heating. With efforts to improve transportation planning and enforce environmental regulations, there are steps being taken to mitigate these emissions. However, the relationship between changes in pollutant emissions and community health remains complex due to the multitude of factors that influence environmental quality and health outcomes.