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One of the technological advances made in WW1 was air traffic control. It was first created by the U.S army who were able to create two way radios to avoid mid-air  collisions. These were able to send a radio signal for over 140 miles. After this they were able to exchange messages between two planes. After they created a helmet fitted with a microphone inside near the end of 1916, they were able to send a human voice from the ground controller to an in-flight plane for the first time.

Even after the war ended, air traffic control was pursued and continued to be developed. London's Croydon airport was one of the first to introduce air traffic control, then Cleveland in America creating the first control tower in 1930.
Later, in 1935 the radar was created by a Scottish physicist Robert Watson-Watt's. The radar was used to track flights from one airport to the other

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Zeppelins were flying vehicles creating during world war one. They are hydrogen filled airships, that were used for strategic bombing (which had not existed before WW1).  The zeppelins were able to fly higher and farther than the fix- winged aircrafts and could carry a heavier payload. Although they were very slow and aerial raids were very difficult.

Both the Germans and the Allies used the zeppelins in WW1, although Germany had used them more extensively. Creating these tools stripped the British of their protection provided by the English channel, this meant the Germans could attack the English mainland.

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Flamethrowers were a  war tool used by the Germans, that would spread fire by shooting out burning fuel. One of the earliest flamethrowers used, was back in 5th century. These flamethrowers had burning coal or sulphur filling up tubes and were used by blowing in one end of the tube and the burning mass would be shot at their enemies.

In WW1 there were two forms of flamethrowers.
One was small and could be carried by just one man, this one used pressurized air and nitrogen/ carbon dioxide to shoot out burning oil as far as 18 meters at their targets. This one was called "Kleinflammenwerfer"
The other was larger and could shoot twice as far as the smaller one and could maintain a constant flame for forty seconds which was impressive at its time. But used a lot of fuel, which is very expensive. This one was called "Grossflammenwerfer."