1. Why is damage to the ozone layer a cause of concern? What steps are being taken to limit this damage?
2. Explain 3R
Answers
Answer:
the damage occur in ozone layer because of pollution.
precautions should taken
1. use public vehicles
2.stop smoking
3.do not burn garbage
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Answer:
1. The ozone layer is a blanket of gases that envelops the Earth. Ozone layer functions as a protective shield for the living beings on the planet. The main function of the ozone layer is to filter out the harmful ultra-violet rays of the Sun.
The damage to the ozone layer is a cause for concern because:
→ It will not be able to filter out the ultra-violet rays efficiently, and this will cause various skin problems such as skin darkening and skin cancer.
→ Ozone layer maintains a steady temperature on the planet. Damage to the layer might result in the death of many phytoplanktons that leads to increased global warming.
Chlorofluorocarbons (CFCs) are compounds that damage the ozone layer. To limit the damage to the ozone layer, the release of CFCs into the atmosphere must be reduced. CFCs used as refrigerants and in fire extinguishers should be replaced with environmentally-safe alternatives. Also, the release of CFCs through industrial activities should be controlled.
2.The First ‘R’ – Reduce
The concept of reducing what is produced and what is consumed is essential to the waste hierarchy. The logic behind it is simple to understand – if there is less waste, then there is less to recycle or reuse. The process of reducing begins with an examination of what you are using, and what it is used for.
The Second ‘R’ – Reuse
You may have a box of things you keep that are broken or that you don’t have a use for that you hang on to in-case you find another use for them; or you may find bargains on old furniture or go trash picking and get things that you can refinish – in either case you are working towards reusing the item. Learning to reuse items, or re-purpose them for a use different then what they are intended for is essential in waste hierarchy.
One of the best examples for how this is being done today is the modular construction of homes and office buildings that is being created out of discarded shipping containers. These large, semi-truck sized metal containers represent a huge waste problem. Repurposing them as homes and offices saves them from the landfills and doesn’t require the additional expenditure of nature resources to melt down and reconfigure the metals used to create them.
The Third ‘R’ – Recycling
The last stage of the waste hierarchy is to recycle. To recycle something means that it will be transformed again into a raw material that can be shaped into a new item. There are very few materials on the earth that cannot be recycled. One of the issues facing communities that want to become more involved with a recycling effort is that while the relying collection and sorting process may be affordable to implement, there still has to be a facility to receive and transform the discarded waste into a raw material. More progress is being made toward uniting recycling plants with industries that can process the waste material through agreements and incentive credits.