In recent years, the controversy surrounding environmental issues has decreased.

select the best answer from the choices provided

F.

Explanation:

If anything, the environmental issues have increased due to the depletion of the ozone layer. More car manufacturers are producing electric and fuel saving vehicles to answer the demands of the consumer.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.