Answer:
In Natural greenhouse, the earth warms up because the solar energy is re-radiated back towards the earth by the greenhouse gasses. Meanwhile, inn the greenhouse, the interior air is warmed simply as a result of the heat energy from the sunlight heating up the air. The covering of the greenhouse simply prevents the heat from escaping. And since the already warm air is trapped inside as more radiation pours in, the temperature increases.
Step-by-step explanation: