Problem: Which of the following is true about global climate change? Which of the following is true about global climate change? Once carbon is released to the atmosphere by burning fossil fuels, there is no known process that could remove it from the atmosphere. A new technology would need to be invented. CO2 is the only greenhouse gas. CO2 levels have risen rapidly since the industrial revolution, and this has been conclusively linked to the burning of fossil fuels. The temperature on earth has never been hotter than it is now.