Task: Question Answering
Input (English): Process:  -Greenhouse gases are released into the air by human activities -The earth changes energy from the sun into heat -Heat rises from the ground -Greenhouse gas molecules in the atmosphere prevent the heat from going into space -The temperature of the earth increases -The temperature continues to rise and melts the polar ice caps -The temperature rises even faster.
 Question: What is the effect of it will be hard to detect their presence on a greater greenhouse effect.?
Output (English): none