Question

which gas has recently increased in the mesophere, creating a rise in water vapor which has led to the formation of high-altitude clouds that are visible night?
a. ozone
b. methane
c. carbon dioxide
d. hydrogen

Answer 1

The gas that has recently increased in the mesosphere, leading to a rise in water vapor and the formation of high-altitude clouds that are visible at night, is **b. methane**. Methane emissions can contribute to the increase in water vapor in the atmosphere, impacting cloud formation.