Articles by Grist staff

Tom Konrad on cellulosic electricity

The following is a guest essay by Tom Konrad, a financial analyst specializing in renewable energy and energy efficiency companies, a freelance writer, and a contributor to AltEnergyStocks.com.

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Romm v. Khosla

In a persuasive series of articles entitled "Pragmatists vs. Environmentalists" (Parts I, II, and III), Vinod Khosla has provided the reasoning behind his "dissing" of plug-in hybrids, which drew the ire of Joseph Romm. Neither seems to think the argument is settled, and Romm returned fire here.

To summarize, Khosla argues that cellulosic ethanol shows more promise for reducing carbon emissions than plug-in hybrids, because the barriers to plug-ins (the need to improve batteries and clean up the grid) are harder to surmount than the barriers to cellulosic ethanol (the improvement of conversion technology). In his words,

I consider replacing coal-based electricity plants (50-year typical life) a much longer, tougher slog than replacing oil with biofuels (15-year car life).

Romm blasts back, reiterating the multiple problems of corn ethanol in response to the first of Khosla's series, but has not yet responded to his point about cellulosic. I thought I'd tackle the point myself.

There isn't enough biomass

According to the National Renewable Energy Laboratory's From Biomass to Biofuels (PDF) study, given all the available biomass in the United States, we will only be able to displace a little less than 2 billion barrels of oil equivalent a year. But we currently use about 7 billion barrels of oil a year, so to displace all our oil usage, we would need nearly a 4x increase in fuel efficiency (not the 1.5x increase in internal combustion engines Khosla talks about).

Wal-Mart CEO outlines lofty green goals

Wal-Mart CEO Lee Scott made a big ol’ speech yesterday spelling out ambitious social, health, and environmental goals for the retail behemoth. Wal-Mart will work with other retailers to boost industry-wide green standards, said Scott, and, within five years, Wal-Mart suppliers will be required to meet stringent environmental standards — and may even be paid […]

Rule change eases restrictions on wolf kills in northern Rockies

Photo: iStockphoto The U.S. Fish and Wildlife Service today announced it is altering a rule that will make it easier to kill gray wolves in Montana, Idaho, and Wyoming. Gray wolves in the area are still protected under the federal Endangered Species Act, though the FWS intends to delist them this spring and hand management […]

Al Gore tells World Economic Forum the climate situation is dire

In a speech spiced with signature phrases like “moral imagination” and “planetary emergency,” as well as plenty of references to future generations, Al Gore warned attendees at the World Economic Forum in Davos, Switzerland, that the climate situation is dire. “The climate crisis is significantly worse and unfolding more rapidly than those on the pessimistic […]