The Sun Is Gradually Increasing in Luminosity as It Ages

question 43

Multiple Choice

The Sun is gradually increasing in luminosity as it ages. It is 20% more luminous than it was when it was born. Why isn't this considered to be an explanation for global warming?

• A) The Sun is increasing in luminosity much too slowly, over many millions of years.
• B) The scientists are covering up this potentially valid explanation.
• C) The amount of energy the Earth receives from the Sun remains constant regardless of what the Sun does.
• D) What the Sun was doing millions of years ago is what determines Earth's temperature, since the Earth doesn't respond directly to what the Sun is doing today.

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Definitions:

Equilibrium Price

The market price at which the quantity of goods supplied equals the quantity of goods demanded, leading to market stability.

Positive Externality

A benefit enjoyed by a third-party as a result of an economic transaction they are not directly involved in.

Equilibrium Quantity

The amount of products or services available that matches the amount sought after at the price where supply meets demand.

Socially Optimal

A condition in which resources are allocated in the most efficient way from the perspective of society as a whole.