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Air pollution can occur naturally or be caused by human activities. [4] Air pollution causes around 7 or 8 million deaths each year. [5] [6] It is a significant risk factor for a number of pollution-related diseases, including heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma and lung cancer.
The risk of air pollution is determined by the pollutant's hazard and the amount of exposure that affects a person. [36] For example, a child who plays outdoor sports will have a higher likelihood of outdoor air pollution exposure than an adult who tends to spend more time indoors, whether at work or elsewhere. [36]
Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems. Health problems attributed to air pollution include premature death, cancer, organ failure, infections, behavioral changes, and other diseases.
The health and environmental impact of transport is significant because transport burns most of the world's petroleum.This causes illness and deaths from air pollution, including nitrous oxides and particulates, and is a significant cause of climate change through emission of carbon dioxide.
Health consequences caused by exposure to polluted air depend on which chemicals are in the air, Pate said. But wildfire smoke is one the worst kinds of air pollution that people can breathe.
Sources of water pollution are either point sources or non-point sources. [155] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [156] Pollution is the result of the cumulative effect over time.
Most places in the world have pollution above the acceptable standard. Here’s how each region fares. Air Quality Is Bad Pretty Much Everywhere, New World Pollution Report Finds
How air pollution impacts our brains. How air pollution affects mental health and cognition; How air pollution threatens brain health (from PNAS) Industrial toxicants and Parkinson's disease; Ozone pollution, oxidative stress, synaptic plasticity, and neurodegeneration; Ozone and Photochemical Oxidants, pollutant formation explained. Graph is ...