If carbon dioxide, methane, and water vapor were not in the atmosphere, then A. the organisms currently living on Earth's surface would find it easier to survive. B. the weather and climate of planet Earth would not be affected C. the Earth's surface would be much colder than it is OD. the Earth's surface would be much warmer than it is

## Step 1<br />The problem is asking us to consider the effects of the absence of certain gases in the Earth's atmosphere, specifically carbon dioxide, methane, and water vapor. These gases are known as greenhouse gases, which play a crucial role in maintaining the Earth's temperature.<br /><br />## Step 2<br />Greenhouse gases absorb and re-emit the sun's heat, which helps to keep the Earth warm. This process is known as the greenhouse effect.<br /><br />## Step 3<br />If these gases were not present, the Earth's surface would be much colder than it is. This is because the greenhouse effect would not occur, leading to a significant drop in the Earth's temperature.