Click aici pentru a downloada  Riscuri si Hazarde Naturale

hazarde naturale,riscuri extreme,inundatii,uragane,el nino,pororoca,taifunul,tsunami,cum se foprmeaza un tsunami,de ce apar eruptiile,ce sunt gheizerele,cand se formeaza tornadele, cand se produc avalansele,Natural hazards, extreme risks, floods, hurricanes, El Nino, pororoca, typhoon, tsunami, as foprmeaza a tsunami of flares occurring that are geysers, when tornadoes form when avalanches occur