“If we’re willing to go down this road of squeezing whatever petroleum we can out of the earth, we can easily get carbon dioxide levels up to unfathomable levels and put in motion what would be dramatic or catastrophic changes in our climate system,” says Michael E. Mann, a geophysicist and director of the Earth System Science Center at Penn State University.
RENEWABLES PROGRESS, BUT NOT FAST ENOUGH
Renewable technologies have had their successes. The average cost of a solar power system has fallen by 31 percent in the last two years. Solar now generates six times more electricity in the U.S. than it did a decade ago, and wind produces 14 times more. Most major automakers offer some type of electric vehicle.
And this success has come despite the fact that renewable energy’s major benefit – that it doesn’t pollute – is given little or no value in the marketplace because most governments haven’t adopted taxes or penalties for fossil fuel pollution.
But the outlook for wind, batteries and biofuels is as dim as it’s been in a decade. Global greenhouse gas agreements have fizzled. Dazzling discoveries have been made in laboratories, and some of these may yet develop into transformative products, but alternative energy technologies haven’t become cheaper or more useful than fossil fuels.
Solar, wind and geothermal sources together accounted for 4.8 percent of U.S. power generation last year. Ten percent of U.S. gasoline demand was satisfied with corn ethanol, but ethanol and other fuels made from non-food sources have yet to hit the market.
“In many cases, renewables aren’t ready for primetime yet,” says George Biltz, vice president for energy and climate change at Dow Chemical, which continues to work on a host of renewable technologies.<< previous 1 2 3 4 5 6 7 8 9 10 11 next >>