1. An:  Global warming is the largest threat to humanity because it threats humans life as we know it  the average temperature of the earth would increase glaciers would melt resulting in scarcity of water which leads to wars on water resources

    An:  Global warming is the largest threat to humanity because it threats humans life as we know it  the average temperature of the earth would increase glaciers would melt resulting in scarcity of water which leads to wars on water resources

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