Wikipedia definition of the outdoors: For most of human history, the greater part of the Earth's terrain was wilderness, and human attention was concentrated in settled areas. The first known laws to protect parts of nature date back to Babylonian Empire and Chinese Emipre. In the Middle Ages, the Kings of England initiated one of the world’s first conscious efforts to protect natural areas. They were motivated by a desire to be able to hunt wild animals in private hunting preserves rather than a desire to protect wilderness. Nevertheless, in order to have animals to hunt they would have to protect wildlife from subsistence hunting and the land from villagers gathering firewood.[3] Similar measures were introduced in other European countries.
Wikipedia definition of link exchange: Link exchange has been a long time practice by website owners since the beginning of the web. In the last few years (after year 2000), this practice has gained more popularity as search engines such as Google started favoring sites that had more links in the rankings.