World's history (part 15): 21st century[edit] Depiction of theInternet, a source of informationandcommunication Main article:21st century The 21st century has been marked byeconomic globalization, with consequent risk to interlinked economies, and by the expansion of communications with mobile phonesand the Internet. Worldwidedemandandcompetitionforresourceshas risen due to growing populations and industrialization, mainly in India, China and Brazil. This demand is causing increased levels of environmental degradation and a growing threat of global warming.[197]That in turn has spurred the development of alternate or renewablesources ofenergy(notablysolar energyand wind energy), proposals for cleanerfossil fueltechnologies, and consideration of expanded use of nuclear energy(somewhat dampened bynuclear plant accidents).[198][199][200]