What is currently the most important environmental issue in Yemen?

Lack of water

Explanation:

The most important and pressing environmental issue in Yemen is that of lack of water. This is a common problem all over the Middle East and in many regions of Africa. Yemen is mostly composed of desert, making it a very dry country. Moreover, natural resources are not abundant in this region. The availability of water is likely to become one of the most pressing problems in the world in the near future.

The most current environmental issues in Yemen are: Very limited freshwater resources, lacking supplies of drinkable water, [ and overgrazing of plants. ]