Carbon trading is a strategy to reduce carbon emissions and the effects of climate change. Participants in a carbon trading market agree to a limit on the amount of emissions allowed per participant, and are then allowed to buy and sell the right to emit up to that maximum. Participants with total emissions below the target limit can sell that difference to other participants who would have otherwise exceeded the limit.

“Citizen journalism” refers to the reporting of news events by members of the public, typically using the Internet to spread information. Citizen journalists may report facts and news that are largely ignored by traditional media organizations, or provide analysis, detail, and critique of current events. Content produced by citizen journalists is often and easily spread through personal websites, blogs, microblogs, social media, email newsletters, and things of that nature.

In 1981, negotiation and conflict resolution specialist Roger Fisher suggested that the codes for the U.S. nuclear arsenal ought be kept in a capsule surgically implanted next to the heart of a volunteer. The volunteer would remain by the side of the U.S. President at all times, always carrying a butcher's knife. If the President ever wanted to fire nuclear weapons, he would have to personally kill the volunteer with said knife to extract the codes required. The proposal has colloquially been referred to as "the Fisher Protocol."