A biome is a large community of plants and animals that occupies a distinct geographic region. Terrestrial biomes, typically defined by their climate and dominant vegetation, include grassland, tundra, desert, tropical rainforest, and deciduous and coniferous forests. The two basic aquatic biomes, freshwater and marine, can be further broken down into categories such as lakes and rivers or pelagic, benthic, and intertidal zones. At what latitudes does biodiversity generally increase?
Back in the day
The 1992 Earth Summit held in Rio de Janeiro, Brazil, produced a treaty aimed at reducing greenhouse gas emissions in order to combat global warming, but it failed to establish mandatory limits or enforcement provisions. The Kyoto Protocol is an amendment to the agreement that establishes these limits. Countries that ratify this treaty promise to either reduce their emissions of carbon dioxide and five other greenhouse gases or engage in emissions trading. When is the protocol set to expire?
Born on a day like today
Many countries were apprehensive when Kim Jong-Il, who is rumored to have masterminded several terrorist bombings in the 1970s and 80s, succeeded his father as ruler of North Korea in 1994. Although Kim took steps to improve international relations early in his rule, the country's continued pursuit of nuclear weapons technology soured its dealings with the West. Kim has a reputation for personal extravagance; what are some examples that have been cited as evidence of his excesses?