Well, they're batting .500 with their lies. Yes, the accelerated invasion of cheatgrass (Bromus tectorum) is a huge problem in the Great Basin. After a fire on the sagebrush steppe, it is the first colonizer, and "cheats" the soil of moisture that would encourage the regrowth of sagebrush and other dominants. The spread of cheatgrass is detrimental to all native animals that depend on the sagebrush steppe, but, sadly, it's here to stay. It will not be eradicated! We have to intelligently manage these new "grasslands" now.
Juniperification (a real word) is also a problem, but a minor and more manageable one. It seems that native junipers and pinyon pines are spreading from the mountainsides into the sagebrush valleys,thereby causing "islands" and "pockets" of sagebrush, rather than huge, unbroken swaths of it. This is detrimental to species, such as the sage-grouse, that require more than just "pockets" of sagebrush to thrive. But as we speak, crews are working all over the Great Basin cutting down and removing junipers from these valleys. Time will tell if this strategy works.
As for drought, all these animals are well adapted to survive. And finally, as for climate change, well... hahahahahahahaha!
They'll never give this charade up until we all freeze to death.
These eco nuts think that they can pass regulations to repeal the laws of physics / science.