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how gravity waves cause the double - spiral of hurricane formation ; how gravity waves enable a spider to build its web [ without the use of air flows ] ; how gravity waves can be usedto createman - made tornadoes
the same weather systemscreatetornadoes that kill humans
thunderstorms in the atmosphere(passive) caused bytornadoes on Earth
to knowwill leadto man - made tornadoes
head injuriesmay have ... causingdeath during tornadoes
the cold front issparkedtornadoes in the U.S.
different temperature Atmosphere and air pressures(passive) are caused byTornadoes on Earth
a droughtmay be preventingtornadoes in the U.S.
that the early Facebook investor has bestowed a $ 300,000 investment upon Canadian inventor Louis Michaudcan createman - made tornadoes
deaths and damaged or destroyed homes(passive) caused bydeaths and damaged or destroyed homes
a tornado to occur ... what is a tornado made out ofcausesa tornado to occur ... what is a tornado made out of
different spiral processsetdifferent spiral process
many problems for human lifecausemany problems for human life
anguish and aid workers still begging that government for permission to come give needed helpcausinganguish and aid workers still begging that government for permission to come give needed help
build and maintain our roads , railways and structuresdesignbuild and maintain our roads , railways and structures
off the weather forecastshould ... leadoff the weather forecast
death and destruction(passive) caused bydeath and destruction
what damage(passive) has been caused bywhat damage