I like yoga
Yoga is pretty interesting. It is a combination of mental, physical and spiritual practices that originated in India.
I use yoga to help my concentration 
Yeah it has many purposes for different people. The origins have been speculated to originate from the sixth or fifth century BC>
Really? it has a very long history
It's only been since the 1980s that it has become popular as a physical exercise across the Western world.
Was yoga a religious practice? 
I think yoga is a religious practice for some people and they connect it with their beliefs in Hinduism, Buddhism, or Jainism.
Can one do yoga in a noisy place ? 
I dont see why not. Yoga is taught in many gyms around the country and I have yet to go in a gym that is quiet. I think some part of yoga are about finding some inner peace, like mediation.