I never said the earths magnetic field, produce or store electricity.

I found this in an article

However, if the magnetic field gets substantially weaker and stays that way for an appreciable amount of time Earth will be less protected from the oodles of high-energy particles that are constantly flying around in space. This means that everything on the planet will be exposed to higher levels of radiation, which over time could produce an increase in diseases like cancer, as well as harm delicate spacecraft and power grids on Earth.

https://www.nationalgeographic.com/science/article/earth-magnetic-field-flip-north-south-poles-science?cmpid=int_org=ngp::int_mc=website::int_src=ngp::int_cmp=amp::int_add=amp_readtherest

And what exactly do they use for shielding? Or how does that shield works?

I never said the earths magnetic field field, produce or store electricity.

I found this in an article

However, if the magnetic field gets substantially weaker and stays that way for an appreciable amount of time Earth will be less protected from the oodles of high-energy particles that are constantly flying around in space. This means that everything on the planet will be exposed to higher levels of radiation, which over time could produce an increase in diseases like cancer, as well as harm delicate spacecraft and power grids on Earth.

https://www.nationalgeographic.com/science/article/earth-magnetic-field-flip-north-south-poles-science?cmpid=int_org=ngp::int_mc=website::int_src=ngp::int_cmp=amp::int_add=amp_readtherest

And what exactly do they use for shielding? Or how does that shield works?