New Question Which of these is a significant GREENHOUSE GAS? Carbon monoxide (CO) Hydrogen (H_(2)) Nitrous oxide (N_(2)O) Oxygen (O_(2))

## Step 1: Define Greenhouse Gases### Greenhouse gases are gases that trap heat in the atmosphere, contributing to the greenhouse effect. They include carbon dioxide, methane, nitrous oxide, and fluorinated gases.## Step 2: Identify Significant Greenhouse Gases### Among the given options, nitrous oxide ( ) is a significant greenhouse gas. It has a high global warming potential and contributes to the greenhouse effect by absorbing and emitting infrared radiation.## Step 3: Evaluate Other Options### Carbon monoxide (CO) and hydrogen ( ) are not considered significant greenhouse gases. Oxygen ( ) is abundant in the atmosphere but does not contribute significantly to the greenhouse effect.