An environmental danger is any substance, event, or state that could threaten the environment or adversely impact people’s lives. The international pictogram is for an environmental hazard. It can include any one or combination of toxic chemicals, biological, or physical substances in the environment that result from human activities and natural processes.
Types of Environmental Hazards
These pollutants may include heavy metals, pesticides biological contaminants, toxic wastes, industrial chemicals, and other chemicals. Although not directly health-threatening, some human-made hazards may be detrimental to the well-being of humans. Environmental deterioration can lead to secondary, unwanted effects on the human ecosphere.
Water pollution can cause water pollution that is not immediately obvious. If these substances prove to be persistent (e.g. If they are persistent organic pollutants (e.g. Many of the listed environmental hazards are man-made (anthropogenic). Four types of hazards can be classified: Chemical Physical (mechanical) and Biological psychological Contents. Biological psychological contents:
1 Identification of environmental hazards
5 Psychosocial hazards
Identification of environmental hazards
The four-step environmental risk assessment process. Environmental hazard Identification is the first stage of environmental risk assessment. This involves assessing the risk and likelihood of adverse consequences from environmental stressors. Hazard identification is the process of determining whether and under which conditions an environmental stressor can cause harm.
Sources of data regarding potential hazards are identified during hazard detection. Hazard identification can be used to identify sources of data on potential hazards. For example, hazard identification can determine if a site has been found to contain a number of industrial pollutants. To make these determinations, risk assessors use both epidemiological (e.g.toxicological) data. Illustration of an environmental exposure site conceptual model.
Conceptual model for exposure Hazards are only likely to have adverse effects when they come in contact with vulnerable populations. The development of a conceptual model for exposure is an important part of hazard identification. Conceptual models describe the route that connects a given hazard’s source to the exposed population.
The U.S. Agency for Toxic Substances and Disease Registry lists five elements that should be included within a conceptual model for exposure. These are: Environmental fate and transport or how the hazard moves and changes after release Exposure point or location or where an exposed individual comes in contact. Exposure route or the way an exposed person gets in touch with the hazards (e.g. oral, dermal, inhalation).
Assessing hazard data. After a conceptual model of exposure has been developed for a given hazardous, measurements should then be taken to determine the quantity and presence of the hazard. These measurements should then be compared to the appropriate reference levels in order to determine whether there is a hazard. For example, arsenic should be detected in tap water from a particular well. The measured concentrations should then be compared with the regulatory thresholds that allow for arsenic to be consumed in drinking water. These limits may be exceeded if arsenic levels are found to be consistently lower than those thresholds.
When interpreting hazards data, risk assessors need to consider the sensitivity of the instrument used and the method used to measure them. They also need to consider any detection limits (i.e. the lowest level of a substance an instrument or method can detect). Chemical  Chemical dangers are described in the Globally Harmonized System as well as in the European Union’s chemical regulations. They are caused by chemicals that cause severe damage to the environment. The label is especially relevant to substances with aquatic toxicities. One example is zinc oxide which is a common paint pigment and is very toxic to aquatic life.
Toxicity or other hazards are not considered an environmental hazard. Many poisonous or reactive substances can be neutralized by photolysis, water and organisms. These elimination mechanisms are persistently pursued by toxic substances, which can cause damage over the long-term.
It is important to note that the substance may not be hazardous to the environment if it does not cause immediate toxicity. The effects of large-scale spillage of substances such milk from tanker trucks can be devastating to the local aquatic ecosystems. While most hazards in this category can be attributed to humans, some chemicals such as lead and dioxins may also turn up in the natural environment.
Physical Hazards are occupational hazards that may cause injury with or without contact. Here’s a list: Cosmic Rays Earthquake E-waste Floods Fog Lighting Noise pollution Ultraviolet light Vibrations X-rays Biological It can include samples of a virus, microorganism or toxin (from an organism), which can have a negative impact on human health.
These include: Allergies Avian influenza Bovine Spongiform Encephalopathy, (BSE) Cholera ebola Epidemics Food poisoning Malaria Onchocerciasis(river blindness), Pandemics Pathogens Pesten for allergic people Rabies Severe Acute Respiratory Syndrome (SARS) Sick Building Syndrome.