Magnetite particles, suspected to cause neurodegenerative problems are generated as environmental pollutants from which of the following? 1. Brakes of motor vehicles 2. Engines of motor vehicles 3. Microwave ‘Stoves within homes 4. Power plants 5. Telephone lines Select the correct answer using the code given below.
1, 2 and 4 only
The correct answer is 1, 2, 3, 4 and 5.
Key Points
Magnetite particles:
- Magnetite particles are a highly magnetic mineral form of iron and are known to be present in air pollution.
- Exposure to airborne particulate matter (PM) is associated with pulmonary, cardiovascular and neurological problems .
- Magnetite, a mixed Fe 2+ /Fe 3+ oxide , is ubiquitous and abundant in PM in urban environments and might play a specific role in both neurodegeneration and cardiovascular disease.
- Magnetite has been found in homing pigeons, migratory salmon and even bats, and is believed to play a role in their directional orientation.
- Vehicle brake systems are the major source of airborne magnetite at the roadside. Hence statement 1 is correct.
- Petrol and diesel-engine exhaust are also a source of airborne magnetite. Hence statement 2 is correct.
- Other sources of Magnetite pollution include Power plants. Hence statements 4 is correct.
Important Questions from Environmental pollution
Photochemical smog is a resultant of the reaction among
Which of the following is NOT responsible for the degradation of our environment?
With reference to furnace oil, consider the following statements:
1. It is a product of oil refineries.
2. Some industries use it to generate power.
3. Its use causes sulphur emissions into environment.
Which of the statements given above are correct?
Why is there a concern about copper smelting plants?
1. They may release lethal quantities of carbon monoxide into environment.
2. The copper slag can cause the leaching of some heavy metals into the environment.
3. They may release sulphur dioxide as a pollutant.
Select the correct answer using the code given below.
Considering the primary atmospheric roles and radiative forcing characteristics, which of the following gases is not typically categorized as a long-lived, well-mixed greenhouse gas contributing directly to the Earth's warming, but rather is known for its role in atmospheric aerosol formation and acid deposition?
