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.
The average tornado is on the ground for about 5 miles, but path lengths can vary greatly. Some tornadoes may be on the ground for only a few hundred feet while others may tra â¦ vel over 100 or even 200 miles. The longest damage path on record is 219 miles.1 person found this useful.he severity of damage caused by a torndo can vary widley, and  there is in fact a scale used to rate tornadoes based on that,  called the Enhanced Fujita scale which has si â¦ x levels ranging from  EF0 to EF5.