Is enough being done to prevent species becoming exstinct?   stance: yes:
In fairness, belief in evolution implies a necessary belief in extinction--it's not the pretty part, but it's a part of the package.
And while humans have a moral responsibility to moderate their impact on the natural world, we're doing more right now than any species ever has before. Would it be "enough" if it offset our impact--which is hardly "natural"--or are we supposed to save every last species, however unfit?