Yes, its true the average temperature on Earth is currently 32 degrees Faharenheit. Its been that way for 2.75-million years.
Carbon dioxide is a trace gas amounting to .033% of our atmosphere. If stupid humans could some how double the CO2 it would still be a trace gas at .066%.
And, you want people to believe that humans are causing GW??
All past history for 750-million years the average temperature on Earth was between 60 and 85 degrees Faharenheit and there were no ice caps for 570-million years.
Incoming light, (not from the sun) created coal layers 100-feet thick, limestone 12,500 feet thick and diatoms filled up the ocean basins that were turned into pools of oil with meteor impacts.
Tropical plants grew at the poles using incoming light that did notcome from our sun. Earth's atmosphere was 750 pounds per square inch extending 3,000 miles above the planet. Sunlight could not penetrate such a thick atmosphere. The sun didn't burn as hot as it does today. Our solar system was in close proximity to a group of stars putting out mire than 100 times the light we have today and it shined 24-hours a day. Diatoms can multiply 8 times in 24-hours given 24-hours of light and ideal conditions. These are the creatures that filter your drinking water and created oil.
About 3-million years ago an explosion near Orion kicked our solar system into an elliptical orbit in the local group. The temperature suddenly droped to 32 degrees F. and stayed there.
If you want to know more read the book.