i am a high school student i want to know about new invention of my level?

Question

for e.g.
1. production of h2s by improved method
2.improved wheel chair

Answer 1

What do you want to know?

Answer 2

You might want to look into the production of Hydrogen gas using a catalyst... this is how it will probably be produced for mass production to supply automobiles.

Answer 3

Okay this is not an answer because after reading the question three times, I still can't tell what you are asking.

Think your question through and reword it.