What are environmental reasons to use alternative energy sources?

so the air doesn't pollute and pollute earth, which would melt icebergs and rise the oceans, and also take away the homes of penguins and polar bears and such.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

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