Question

why does the temperature rise when greenhouse gas levels increase?

Answer 1

The temperature rises because green houses like co2 does not allow the heat to escape from the earth.As a result temperature of earth rises.

Answer 2

Green house gases such as NO2 and CO2 , allows the entry of sunlight but it traps the heat and does not reflect, as there is increase in greenhouse gases more and more heat will be trapped, which will inturn result of increase in temprature level