system
Given the following post, respond as if you're commenting on Reddit:
human
Why doesn't the Earth build up a positive charge from cosmic rays?

We are continually bombarded with lots of cosmic rays, which are mostly bare protons. Shouldn't this mean that the Earth accumulates an excess positive charge over time?
gpt
Cosmic rays are not the majority of particles striking Earth. In quantity they are greatly outnumbered by the particles of the solar wind, which are both positively and negatively charged. 

If the Earth does happen to acquire a slight positive charge, it will tend to repel positively charged particles and more strongly attract negative ones. If Earth acquires a negative charge then the opposite will happen. This means that over time, the charge of a large object will tend toward neutral.