Fossil fuels, which include natural gas, propane and oil, are used to produce roughly 85 percent of all of the energy we consume. However, they are non-renewable resources that produce 21.3 billion tons of carbon dioxide a year. Nearly half of that cannot be absorbed by nature. Carbon dioxide is thus released into the atmosphere and is a leading cause of global warming. Despite all of the renewed talk of helping the environment and stopping the Earth's temperature from rising further, Inventor Gordon Kaitting did not see meaningful action being taken as a result. more... See more text