Because Astronomers use light-year instead of kilometers to measure distances in the universe because distances in space are so huge that km would be too large to manage.
Answer:
nicec
Explanation:
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<span>Ecological surplus is when a country has more natural resources than it needs. Ecological deficit is when a country has less than it needs. How much of it's resources a country uses is it's environmental footprint, which determines whether it's an ecological surplus or deficit.</span>
