You would die.
What would happen next if sagebrush is disappeared frrom a desert?
You would die.
if the oxygen
Everything would die
There would be no bees to pollenate the flowers.
If plants disappeared from earth, all life on earth depending on photosynthesis would disappear.
This cannot possibly happen, so asking what would happen if it did happen is an exercise in stupidity.
life would follow
If that happened, we would all die. However, that essentially can't happen. In order to actually get rid of water, you'd have to shoot it into space. Boiling it just adds it to the atmosphere as water vapor, and it eventually precipitates back out as rain.
if cordgrss disappear plants eaters would get less nutrients
everything will die
know one knows. because we would all be frozen.