Question

why is the entire world trying to reduce the use of vehicles that use petroleum products as fuel?

Answer 1

When a substance is in its solid state, as a solid phase material, its particles are arranged into a lattice. These lattices are arranged to achieve minimum stored energy. The bonding of lattices is chemical in nature, and is an important factor in categorizing lattices.
Ions are bonded with ionic bonding, creating a giant ionic lattice.
Atoms are bonded with covalent bonding, creating a giant molecular lattice.
Molecules are bonded with covalent bonding (for atoms forming molecules) and intermolecular bonding (between separate molecules), creating a molecular lattice.

Answer 2

because we are using it over. if we do not stop it or put limitations it will be fully vanished. though it takes milllions of years to made. so we must make effforts like using bicylce for short distances.