Is Buddhist lifestyle harmless to living beings? Is the Buddhist lifestyle harmless to living beings? Lot's of creatures are being killed in various human activities (walking, farming, building, etc.) Did Buddhists found a way to live while not harming other living beings? If yes, how?

p.s. For more info, read the same question on this SE.
Buddhism focuses on our intentions, and therefore intentional killing is adviced against. 

Obviously, the consequences of our actions may sometimes lead to harm despite our good intentions. In buddhism we are - arguably - primarily accountable for the latter, our intentions, even though consequences also matter.

Also, see this answer written not long ago:

Selling an animal to butcher will break first precept?