Re: Where can we find plasma on Earth?

While most plasma occurs in the stars and in the interstellar medium, 
plasma does exist in our local environment under the right conditions.  
Some examples include lightning, electric sparks (even those produced by 
static electricity), the auroras, welding torches, fires, and neon signs. 
The "plasma spheres" that you see in stores do contain plasma.  Plasma 
also exists inside fluorescent lamps but it cannot be seen because of the 
white phospor layer on the inside of the glass tube.