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A second Green Revolution can't come soon enough for UK scientists, who say that their government should invest $3.3 billion in crop research to help feed the world. That world will only grow hungrier, and will require a 50 percent boost in food production over the next 40 years.

Is it the car of the future? The Segway of the future? An idea destined to go nowhere? Something in between? Today GM unveiled the PUMA, a two-wheeled city vehicle built in collaboration with Segway. PUMA stands for Personal Urban Mobility and Accessibility, and the idea is to create a small, highly maneuverable mini-car ideal for congested cities where the traffic is slow and the parking is nonexistent.

The movement of the crowds at the semi-funereal 2008 Los Angeles Auto Show said it all. No one, it seemed, wanted to hang out with the most beleaguered of the Detroit automakers, Chrysler and GM. As plenty of attendees noticed, Chrysler’s large expanse of showroom floor was all but empty most hours of the day. Same across the room at the General Motors stand: Aside from a small group milling about the Chevy Volt, all was quiet.

Like analog TV and Marshall Tucker fans, solar power is a holdover from the Carter administration. Yet, for modern businesses like Google and General Motors, it's a promising alternative energy source. So far, "promising" is as far as it's gotten: the density in data centers and in the typical office complex -- lots of demand in a small area -- turns solar arrays into a pipe dream. At Google HQ, for example, nearly every rooftop is covered with solar panels, and they have plans for more coverage, but the array can only provide for about 30 percent of peak power usage.

Does GM use human bodies as crash test dummies? That's not the plot of a 1970s cult classic; it's the claim of one car-safety specialist in Sweden, who told newspaper Expressen that GM recently wrapped up a multiyear research study using human cadavers in car-crash simulations. The man says Saab cars were involved in the project, which reportedly involved people who had donated their own bodies—assumedly in the name of scientific research—not political dissidents. Well, that's a relief.

When genetically modified (GM) crops were first introduced, they were met with quite a lot of skepticism, not only in regards to their unproven long-term safety and efficacy but to their potential to be high-yield super crops. A three-year University of Kansas study has now confirmed the findings of a previous University of Nebraska study as to the yield abilities of the GM soybean from Monsanto: not only is the crop not a super-yield producer, it actually produces less than conventional yields, even under optimal conditions.

We slogged through the rain and traffic all the way across town to the Javits Center for the 2009 New York Auto Show. No, its not Detroit or Geneva; but the show still has a fair share of announcements, plus a chance to see up close those cars that recently debuted in other cities.

So far, its really been an American show—with big debuts by GM and Chrysler. It was also the year of retro design and nostalgia. Pontiac brought out three new models, including a yet-to-be-named revival of its former El Camino car/truck hybrid—extolled by rapper 50 Cent. Dodge took us back to the seventies, introducing three versions of its revived Charger model. And Mercedes waxed poetic about the glory days of the 80s, when its belching diesel sedans ruled the upper-class subdivisions. It also introduced SUVs using its new BlueTec clean diesel technology.

Yesterday morning Sir Richard Branson of Virgin Atlantic Airway pulled up to the IAC Building in a hydrogen fuel-cell-powered Chevy Equinox SUV. There he was joined by executives from GM and Rolls Royce to announce a smorgasbord of environmental initiatives. A clear theme was hard to distinguish, other than the color green.

Heres an odd PR move making the blog rounds today: Bob Lutz, the General Motors Vice Chairman whos driving the charge to build the Chevy Volt plug-in hybrid, was recently quoted in D Magazine calling global warming a crock of s**t.