Airborne radar, jet aircraft and rocket aircraft.
The fighter aircraft, bomber aircraft and tank were all introduced and extensively developed in WW1
Airplane's
during World War II
increased military casualties in battles fought during the war
the first ever mass produced tank was developed and used near the end of WW1
Technology developed during the war was used for consumer products.
the two advances were the aircraft and the tanks
Jet engine airplanes were introduced by Germany at the end of WW2There were many technologies developed during WWII. One example is water cooled engines. They maximized efficiency of prop engines. Also the Germans developed swept wings with reduced drag and allowed for higher speeds.
Radar (Radio Detection and Ranging) was the technology developed for detection of enemy air power.
Tanks (armored cars) were used for the first time at the Battle of the Somme during World War 1. More modern tanks were developed just before the end of the war. Anti-aircraft guns, sub-machine guns, and automatic rifles that could be used by one man, were developed during World War 1. The hand grenade was in existence but was quickly developed for use during WW1. Poison gases such as chlorine gas and mustard gas were first used in World War 1 although they had already been developed.
The Albatross C15 (also referred to as the C.XV) was used by Germany. It was a 1918 military reconnaissance aircraft developed during World War I. Although it was never used during the war, it was used in peacetime as a transport aircraft under the designation of L47.
There is no way of knowing if new technology will solve world problems since we have no way of knowing what new technology is going to be developed, or for that matter, what world problems will exist at the time that technology is developed. It is possible that new technology will be used to solve world problems, and it is also possible that new technology will be used to make world problems worse. We will have to wait and see.