Almost everything we buy has a price and an expiry date. For some products, we know the exact expiry date. For others, we can only guess when they might expire.
In agriculture, we classify products into two categories: perishable and non-perishable commodities.
Perishable commodities are those that spoil quickly. These include items like milk, fruits, and vegetables. For example, milk usually expires within a day or two. You need to consume it fast or it goes bad.
On the other hand, non-perishable commodities last much longer. Items like rice, flour, and beans can stay good for months or even years if stored properly. However, even non-perishable items can expire quickly when we change their form. Take rice as an example. Raw rice can last for years, but once it’s cooked, it must be eaten within a day or two.
You might question me with things like diamonds or rocks?
While they don’t have a typical “expiry date,” they still change over time. Diamonds are incredibly durable but can chip or crack under certain conditions. Rocks, too, last for millions of years but eventually erode due to natural processes called weathering and they transform into soil. Everything experiences transformation, even if it takes centuries.
This idea of expiry applies to almost all aspects of life.
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