Air pollution is a type of environmental pollution that affects the air and is usually caused by smoke or other harmful gases, mainly oxides of carbon, sulphur and nitrogen. In other words, air pollution is the contamination of air due to the presence or introduction of a substance which has a poisonous effect.
Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs.
Answer:
Renewable energy resource as an obstacles for the growth of migratory salmon populations: It is now believed that the reduce access to spawning grounds and nursery areas, leading to a decrease in migratory fish populations is due to the dam structures of large storage-type schemes, which can create great obstacles for the movement of migratory fish species.
Explanation:
- Storage-type schemes ( big dams) can significantly change the downstream flow regime,and may also alter water temperature and quality, and even make it inhabitable for fish to live.
- As the storage of water can be linked with high evaporative losses, which in turn results in high life cycle water footprints compared to other sources of electricity.
<u>Run-of-river (ROR) schemes are HEP schemes: </u>
They operate without water storage, using the flow within a river channel.They are ecologically friendly and do not disturb the natural mechanism for the migrating salmons.
Working Principle:
They are normally used to regulate water levels, which allows a proportion or part of flow to be diverted down a secondary channel to a turbine before it is returned to the main channel further downstream.
There are some modern turbine types used in ROR HEP(hydroelectric power) schemes, which are also designed to allow fish to pass through the system unharmed if the fish do pass through the intake screens.
The term "pneumocephalus" refers to the condition in which air is present in the cranial cavity.
What happens in pneumocephalus?
- Increased intracranial pressure causes tension pneumocephalus, a neurosurgical emergency that can cause headaches, seizures, loss of consciousness, and even death.
- Clinically separating the two entities is difficult but essential.
- Tension pneumocephalus following skull base surgery was found to be a rare phenomenon with just eleven cases described, according to a survey of the literature on PubMed/MEDLINE.
- After treatment, the majority of patients experienced full symptom relief.
- Following skull base surgery, tension pneumocephalus is a potential complication that clinicians should be aware of.
- An understanding of imaging characteristics and a high level of suspicion are necessary for accurate diagnosis. Rapid management is essential to avoid potentially disastrous effects.
Learn more about human skull with the help of the given link:
brainly.com/question/4537715
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