Recycling of paper, plastics and metal cans

Recycling is a technology measure that plays a critical role in preserving and conserving the environment. It involves the process of converting waste materials into reusable materials to reduce the consumption of new resources. Among the given options, recycling of paper, plastics, and metal cans is the most suitable example of modern technology measures for environmental preservation.

Importance of recycling
Recycling helps in several ways to protect the environment and promote sustainability. Some key benefits include:

1. Conservation of natural resources: Recycling reduces the need for extracting and producing new raw materials. By reusing materials like paper, plastics, and metal cans, we can conserve natural resources such as trees, oil, and minerals.

2. Emission reduction: Manufacturing products from recycled materials requires less energy compared to producing them from scratch. This leads to a significant reduction in greenhouse gas emissions and helps combat climate change.

3. Waste reduction: Recycling reduces the amount of waste that goes to landfills or incinerators. Landfills contribute to environmental pollution, and incineration releases harmful gases into the atmosphere. By recycling, we can minimize the burden on waste management systems.

4. Conservation of energy: Recycling helps save energy as it requires less energy to process recycled materials compared to extracting and producing new ones. This energy conservation contributes to a more sustainable future.

Process of recycling
The process of recycling involves several steps:

1. Collection: Waste materials like paper, plastics, and metal cans are collected separately from regular trash. This can be done through designated recycling bins or collection centers.

2. Sorting: The collected materials are sorted based on their type and quality. This ensures that the recycling process is efficient and produces high-quality recycled materials.

3. Processing: The sorted materials are processed to remove impurities and prepare them for recycling. This may involve shredding, melting, or other methods depending on the material being recycled.

4. Manufacturing: The processed materials are then used to manufacture new products. For example, recycled paper can be used to produce new paper products, recycled plastics can be used to make new plastic items, and recycled metal cans can be used in various industries.

5. Reuse: Recycled products are then used by consumers, thus completing the recycling loop. By purchasing and using products made from recycled materials, individuals contribute to the sustainability of the recycling process.

Conclusion
The recycling of paper, plastics, and metal cans is a modern technology measure that greatly helps in preserving and conserving the environment. It reduces the consumption of natural resources, minimizes waste, conserves energy, and contributes to a more sustainable future. Encouraging and practicing recycling is essential for environmental protection and ensuring the well-being of future generations.

Why not option D. It uses more modern technology compared to Option B.