Space architecture of space and a space transportation infrastructure can be accelerated. Virgin Galactic has indicated plans for an orbital craft, SpaceShipThree. The demand for space tourism is one without bound. It is not difficult to imagine lunar parks or cruises by Venus. Another impetus to become a spacefaring species is planetary defense. The classic space mission is the Earth-colliding asteroid interception mission. Using nuclear detonations to split or deflect the asteroid is risky at best. Such a tactic could actually make the problem worse by increasing the amount of asteroid fragments that do end up hitting the Earth. Robert Zubrin writes:
Sustainable tourism the hospitality training institutes that offer a vegetarian choice, and this practice will be extended to all IHMCTANs. Fundamental research was presented in the book «Sustainable tourism development: theory, methodology, business realities» ()) by Ukrainian scientist Professor Tetiana Tkachenko in 2006 уear (with corrections and additions in 2009). The results are used to prepare students in Kyiv National University of Trade and Economics, specialties: tourism, hotel and restaurant business, tourism management, management of hotel and restaurant business, international tourism business and international hotel business. Sustainable tourism Sustainable tourism is the concept of visiting a place as a tourist and trying