About ninety percent of human energy demand is satisfied by burning fossil fuels, releasing increasing amounts of carbon dioxide into the atmosphere and contributing to the enhanced greenhouse effect.
(About ninety percent of human energy demand; is; satisfied by burning fossil fuels, releasing increasing amounts of carbon dioxide into the atmosphere and contributing to the enhanced greenhouse effect)
About ninety percent of human energy demand
is
satisfied by burning fossil fuels, releasing increasing amounts of carbon dioxide into the atmosphere and contributing to the enhanced greenhouse effect