Natural gas is mostly methane. In my piece on the Cornell study, my subhed was âLeakage of methane from fracking boosts shale gas global warming impact.â I didnât note until several paragraphs later that âNatural gas is composed largely of methane,â which comes from the second sentence of the study itself.
Tornado strength is currently measured on what is called the Enhanced Fujita Scale (adapted from the simpler Fujita Scale in 2007), which gives the tornado a rating from 0 to 5 based on estimated wind speeds and the severity of the damage.
What is the difference the way hurricanes are classified and the way tornadoes are classified? Hurricanes are classified based directly on wind speed from Category 1 to category 5 on the Saffir-Simpson scale. Tornadoes are rated based on damage-derived wind estimates, â¦ which are used to rate them on the Enhanced Fujita Scale from EF0 to EF5.