Importantly, as attorney general, I have a responsibility to enforce the laws of this nation, to protect this country from its enemies, and to ensure the fair administration of justice. (businessinsider.com)
A defendant likely wouldn't have standing to sue the state for enforcing the law in general, only for enforcing it on the defendant himself. (law.stackexchange.com)
It is particularly important in generating public pressure to pass and enforce laws against pollution and toxic waste. (dotearth.blogs.nytimes.com)