As our current atmosphere formatch each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere. hydrogen ammonia water vapor oxygen carbon dioxide proportions decreased as it reacted with other elements to form nitrogen. arrowright proportions increased as this gas was released through volcanic eruptions. arrowright proportions decreased as this lighter gas was blown away by solar winds. arrowright proportions increased as plants released this gas into the atmosphere. arrowright proportions decreased as plants used this gas during photosynthesis. arrowrightmed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere. hydrogen ammonia water vapor oxygen carbon dioxide proportions decreased as it reacted with other elements to form nitrogen. arrowright proportions increased as this gas was released through volcanic eruptions. arrowright proportions decreased as this lighter gas was blown away by solar winds. arrowright proportions increased as plants released this gas into the atmosphere. arrowright proportions decreased as plants used this gas during photosynthesis. arrowright