Biology Environmental Issues part 26 (Questions) class 12 XII

TL;DR

This video discusses environmental issues such as ozone depletion, radioactive wastes, and vehicular air pollution, along with their harmful effects and possible solutions.

Transcript

hello friends this video on environmental issues part 26 is brought to you by example.com no more fear from exam question number four why does ozone gold form over antarctica how will enhanced ultraviolet radiation affect us let's look at question number four so why does ozone gold form over antarctica how will enhanced ultraviolet radiation affect... Read More

Key Insights

• 🥺 High chlorine concentration leads to ozone hole formation over Antarctica, causing increased harmful ultraviolet radiation.
• 🥺 Ultraviolet radiation exposure due to ozone depletion can lead to various health problems, including skin cancer, immune system damage, and blindness.
• ✊ Radioactive wastes obtained from nuclear power plants, hospitals, and industries can cause deadly diseases and pose a threat to current and future generations.
• 🚤 Defunct ships and e-wastes contribute to environmental pollution by adding toxic substances to the environment.
• 👱 Initiatives such as introducing CNG, reducing lead and sulfur content, and using catalytic converters have helped reduce vehicular air pollution in Delhi and improve air quality.
• 🤑 It is important to properly dispose of radioactive wastes and convert more toxic substances to less toxic ones before storage.
• ☢️ The long half-life of radioactive elements requires us to consider the impact on future generations when dealing with radioactive wastes.

Questions & Answers

Q: Why does ozone depletion occur over Antarctica?

Ozone depletion occurs over Antarctica due to the high concentration of chlorine, which destroys ozone molecules, creating an ozone hole. This results in increased ultraviolet radiation exposure with detrimental effects on living organisms and the environment.

Q: What are radioactive wastes, and where do we get them from?

Radioactive wastes are materials containing radioactive elements obtained mainly from nuclear power plants, hospitals using radioisotopes for diagnostics, and industries. These wastes pose a significant health risk, including deadly diseases like cancer, and can harm future generations due to their long half-life.

Q: How do defunct ships and e-wastes contribute to environmental pollution?

Defunct ships add to solid waste and pollution due to the presence of toxic substances like lead and mercury. E-wastes, including broken computers and mobile phones, contribute to toxic metal pollution as they contain elements like silicon, iron, and copper.

Q: What initiatives were taken to reduce vehicular air pollution in Delhi, and has air quality improved?

Delhi implemented various measures to reduce vehicular air pollution, such as introducing CNG for public transport vehicles, using petrol without lead, low sulfur content in petrol or diesel, and catalytic converters. These initiatives have led to improved air quality in Delhi.

Summary & Key Takeaways

• Ozone hole over Antarctica is caused by the high concentration of chlorine, which destroys ozone molecules, leading to harmful ultraviolet radiation exposure and its detrimental effects on humans, animals, and plants.

• Radioactive wastes, primarily obtained from nuclear power plants, hospitals, and industries, can cause deadly diseases like cancer and pose a long-term threat to both current and future generations.

• Defunct ships and e-wastes contribute to environmental pollution by adding toxic substances to the environment, such as lead, mercury, and other pollutants harmful to humans and the ecosystem.

• Initiatives, such as introducing CNG for public transport vehicles, reducing lead and sulfur content in petrol and diesel, and using catalytic converters, have been implemented in Delhi to reduce vehicular air pollution and improve air quality.