What are carbon credits?

Credits can be sold in the international market at the prevailing prices via certain credit exchanges. Formalized in the Kyoto Protocol, carbon credits help developing/ underdeveloped countries as they traditionally have lower per-capita carbon emissions than developed countries and will need to emit CO₂ owing to increasing industrial growth. At this point though, these countries can sell their carbon credits to other countries and reap the economic benefits of not polluting the planet.

Why the number 1 is not considered a prime number though it fits the definition?

The number 1, in fact, does not fit the definition of a prime number. A positive integer is called a prime number only if there are exactly two divisors of that number. Since 1 has exactly one divisor (which is 1 itself), it does not fit this definition. Another equivalent definition of a prime number is this: a prime number’s only positive divisor should be less than 1 and itself. Again, 1 does not fit this definition either – there are no positive divisors of 1 which are less than 1.

What is oenology?

Oenology is the science and study of all kinds of wines in the world. It is the study of all aspects of wine from harvesting of grapes to bottling of wines. The word is derived from the Greek word oenos which means wine and logy which means study. An expert in the field of oenology is known as oenologist. A wine maker can also be known as oenologist. This is not related to the tasting of wine - it’s only the study of wine production