Blimps actually date back to the mid-1800s, so one would think that they would maybe be pretty bad at keeping up to environmental standards of today, but this would actually be very wrong! Though they may have been classed as extremely dangerous in terms of being flammable and have been featured in some of the worst aviation crashes known to man, blimps in terms of polluting are very low down the list.
In fact, a blimp uses less fuel in two whole weeks than a Boeing 747 airplane takes to just taxi down the airway! So you can only imagine how much less exhaust is coming out of a blimp. By the time you have flown just 1000 miles in a 747, you will have polluted the Earth over a hundred times more than if you had done the same journey via blimp. Of course, traveling by blimp is a bit tricky and much slower, and there are only 13 active airships in the world today!
There are actually more astronauts in the world than blimp pilots, that’s how low demand the world is for blimp pilots! They are categorized as LTA vehicles which actually stands for lighter than air, this is due to the fact that blimps use high pressure and helium to lift themselves up.
During World War I some blimps were actually used for patrolling purposes, but given the only solid part of a blimp is its gondola and tail fins they would not have held up long under fire! Pilots are able to steer them using two propeller engines and a movable tail & rudder system. This means that on average blimps are able to travel between 150 to 200 miles per day! Usually, with good wind conditions, a blimp can travel at just over 35 miles per hour.