The mice at NYU live in a super-clean environment, and those imported from other labs carry a risk of contamination.

WSJ: Scientists focus on another Sandy loss _ lab mice

To move the country further in the right direction, Mr Roh must now carry out his promises to clean up the chaebol and improve the rule of law.

ECONOMIST: The rewards of freedom

Let us not make things worse by sequestering carbon and so sweeping dirt under the carpet and relying on future generations to carry out a meaningful clean-up.

ECONOMIST: Change of environment

Clean deals have clear constituent pieces, are easy to bring together and line up, and carry few or surmountable obstacles.

WSJ: Keep Gates

They will fetch and carry parts, hold things, pick up tools, sort items, clean up and make themselves useful in myriad other ways.

ECONOMIST: Automation