What are three effects of population growth?
Water shortage. Increase in industrial and community waste. Air, water and land pollution. Increased density of population.
What is the relationship between population growth and health problems?
Rapid population growth and density is correlated with infections, such as tuberculosis and social pathology, such as schizophrenia. The relationship between health and fertility is complex, since in the absence of family planning, improved health decreases mortality and morbidity, and increase fertile life span.
How does overpopulation affect our health and environment?
2 Population is growing rapidly, far outpacing the ability of our planet to support it, given current practices. Overpopulation is associated with negative environmental and economic outcomes ranging from the impacts of over-farming, deforestation, and water pollution to eutrophication and global warming.
How predators may cause problems in the food chain?
Predation is a top-down force because the effects of predators start at the top of the food chain and cascade downward to lower trophic levels. A trophic cascade occurs when predators indirectly affect the abundance of organisms more than two trophic levels down (Figure 1).
How does parasitism affect an ecosystem?
Parasitic plants have profound effects on the ecosystems in which they occur. Parasitism has major impacts on host growth, allometry and reproduction, which lead to changes in competitive balances between host and nonhost species and therefore affect community structure, vegetation zonation and population dynamics.
How do diseases affect ecosystems?
An ecosystem with lots of variation (genetic diversity and diversity of species) is more resilient to the impacts of disease because there are greater possibilities that some species have evolved resistance, or if a species is lost, there will likely be another species to fill the niche of an extinct species.
What disease is caused by the environment?
Some 8.2 million out of the 12.6 million deaths caused by the environment each year are due to noncommunicable diseases, primarily linked to air pollution. Stroke, heart disease, unintentional injuries, cancers and chronic respiratory infections are the top 5 causes of environmental-related deaths.
What are environmental factors that affect health?
They include:
- Exposure to hazardous substances in the air, water, soil, and food.
- Natural and technological disasters.
- Climate change.
- Occupational hazards.
- The built environment.
What are signs of environmental disorders?
Symptoms of an environmental illness depend on what is causing it. The symptoms may be like those you can get with other conditions….Examples are:
- Headache.
- Fever and chills.
- Nausea.
- A cough.
- Muscle aches.
- A rash.
What illnesses are caused by pollution?
Long-term exposure to polluted air can have permanent health effects such as: Accelerated aging of the lungs. Loss of lung capacity and decreased lung function. Development of diseases such as asthma, bronchitis, emphysema, and possibly cancer.
What do you believe is the main cause of environmental issues that cause ill health?
Environmental factors (e.g. overcrowding, diet, climate, stress) and exposures (e.g. from air, food, drink, surfaces) play a part in causing and/or aggravating disease and ill health, both directly and via parents.