Energy. There were two main sources of energy in the modern world.
One is oil, and the other is electricity.
What Earth mostly did today was, um... is to boil water to generate electricity.
Yes, it's very common to boil water.
Nuclear energy and focused electricity generation both boiled water.
It was essentially steam-powered, in a way.
Electricity was already fully available in many countries.
But why did they still use oil?
Simply because batteries still did not meet the requirements.
An important company involved in this was the Laster Electric Car company.
It was actually a subsidiary of the Ross Consortium.
If the charging and energy storage problems of electric cars can be solved, then the Laster Electric Car would usher in a wave of explosive growth.