74. Sustainable Development: Reuse & Recycling

Sustainable development is an approach to human and economic development that:

Meets the needs of current generations.
Does not damage the lives or needs of future generations.
In practice, this means avoiding the depletion of finite resources, protecting the environment, and minimizing global warming.

Renewable vs. Finite: Using renewable resources (like wood from trees that can be replanted) is more sustainable than using finite resources (like crude oil used to make plastic).
Manufacturing Efficiency: Chemists reduce environmental impacts by making processes more efficient (using less raw material) and reducing energy consumption by using catalysts and optimizing temperatures and pressures.

Once a product has served its initial purpose, it should ideally be reused or recycled to save energy and raw materials.

Reusing: Using an item again, either for the same or a different purpose (e.g., refilling a glass bottle with water).
Recycling Glass: * Glass is separated by color and type.
- It is crushed and melted to be reshaped into new products like jars or glass wool for house insulation.
Recycling Metals: * Metals are melted and reformed into new products.
- They are usually separated by element (e.g., separating copper from iron).
- Steel Example: Scrap steel can be added to pure iron in a furnace to reduce the amount of new iron that needs to be extracted from iron ore.

Reduces the need for mining and extracting new raw materials.
Saves energy (it often takes less energy to recycle than to extract new materials).
Reduces waste sent to landfills.
Decreases the environmental impact of manufacturing.