Answer:
Without naturally occurring greenhouse gasses the Earth would turn very cold.
Explanation:
Greenhouse gasses lock in heat so without them all of the heat from the sun would be released into space.
By seeing how long or short the days are. and where sun is located
1/2 * 20 = 10
You can also think of it as the 20 being divided by two.
Nature has to with environmental science because science can be used for studying animals or oxygen