Edwin hubble is credited for the initial development of the big bang theory, an idea which to explain the formation of the universe over 15 billion years ago. which piece of evidence did hubble find that led him to begin the development of the big bang theory? a) the sun is the center of the universe. b) the universe is expanding in all directions. c) new universes are being made on a regular basis. d) all life appeared on earth about 3.5 billion years ago.

B) The universe is expanding in all directions.

Explanation:

i already learned it

significant amounts of nitrogen oxides, carbon monoxide, and other pollution

explanation:

passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. in 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.