Which gas most likely affects human health by contributing to global climate change?

carbon dioxide

Explanation:

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because with to much of it in the atmosphere it would become harder for us to breath and the affects of oxygen deficiency are bad.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs