Pack your portfolios with agricultural plays like Potash (POT), Mosaic (MOS), and Agrium (AGU) if Dr. Paul Ehrlich is just partially right about the impending collapse in the world?s food supply. You might even throw in long positions in wheat, corn, soybeans, and rice.

The never dull and often controversial Stanford biology professor told me he expects that global warming is leading to significant changes in world weather patterns that will cause droughts in some of the largest food producing areas, causing massive famines. Food prices will skyrocket, and billions could die. At greatest risk are the big rice producing areas in South Asia, which depend on glacial run off from the Himalayas. If the glaciers melt, this will be gone.

California faces a similar problem if the Sierra snowpack disappears. Rising sea levels displacing 500 million people in low-lying coastal areas is another big problem. One of the 77-year-old professor?s early books ?The Population Bomb? was required reading for me in college in 1970, and I used to drive up from Los Angeles to hear his lectures (followed by the obligatory side trip to the Haight-Ashbury).

Other big risks to the economy are the threat of a third world nuclear war caused by population pressures, and global plagues facilitated by a widespread growth of intercontinental transportation and globalization. And I won?t get into the threat of a giant solar flare frying our electrical grid. ?Super consumption? in the US needs to be reined in where the population is growing the fastest.

If the world adopts an American standard of living, we need four more Earths to supply the needed natural resources. We need to raise the price of all forms of carbon, preferably through taxes, but cap and trade will work too. Population control is the answer to all of these problems, which is best achieved by giving women an education, jobs, and rights, and has already worked well in Europe and Japan.

All sobering food for thought.

Those of you counting on getting your old union assembly line job back in Detroit can forget it.

The eight year forecast published by the Bureau of Labor Statistics shows that 4.19 million jobs will be gained in the US in professional and business services, followed by 4 million health care and social assistance jobs, while 1.2 million will be lost in manufacturing.

This is great news for website designers, internet entrepreneurs, registered nurses, and masseuses in California, but grim tidings for traditional metal bashers in the rust belt manufacturing states like Michigan, Indiana, and Ohio.

I?m so old now that I am no longer asked for a driver?s license to get into a nightclub. Instead, they ask for a carbon dating. The real challenge for we aged career advisors is that probably half of these new service jobs haven?t even been invented yet, and if they can be described, it is only in a cheesy science fiction paperback with a half-dressed blond on the front cover. After all, who heard of a webmaster, a cell phone contract sales person, or a blogger 40 years ago?

Where are all these jobs going? You guessed it, China, which by my calculation, has imported 25 million jobs from the US over the past decade. You can also blame other lower waged, upstream manufacturing countries like Vietnam, where the Middle Kingdom is increasingly subcontracting its own offshoring.

These forecasts may be optimistic, because they assume that Americans can continue to claw their way up the value chain in the global economy, and not get stuck along the way, as the Japanese did in the nineties. The US desperately needs no less than 27 million new jobs to soak up natural population and immigration growth and get us back to a traditional 5% unemployment rate. The only way that is going to happen is for America to invent something new and big, and fast.

Personal computers achieved this during the eighties, and the internet did the trick in the nineties. The fact that we?ve done didly squat since 2000 except create a giant paper chase of subprime loans and derivatives explains why job growth since then has been zero, real wage growth has been negative, and American standards of living are falling.

Alternative energy and biotechnology are two possible drivers for a new economy. Unfortunately, the last administration did everything it could to stymie progress in both these fields, coddling big oil so China could steal a lead in several alternative technologies, and starving stem cell researchers of federal cash, ceding the lead there to others.

While the current crop of politicians extol the virtues of education, the reality is that we are dumbing down our public education system. How do we invent the next ?new? thing, while shrinking the University of California?s budget by 20% two years in a row? If my local high school can?t afford new computers, how is it going to feed Silicon Valley with computer literate work force? The US has a ?Michael Jackson? economy. It?s still living like a rock star, but hasn?t had a hit in 20 years.

China can have all the $20 a day jobs it wants. But if it accelerates its move up the value chain, as it clearly aspires to do, then America is in for even harder times. I?ll be hoping for the best, but preparing for the worst. How do you say ?unemployment check? in Mandarin?

Hey! You there, staring at this monitor. This is your PC talking to you. No, not you over there standing in the background. I?m talking to the guy sitting in front of me poking at my keys. Ouch! That one hurt!

So you thought no one was watching, did you? Let me set you straight. About a month ago you clicked on a certain website, and I installed myself as a cookie on your computer, which is an innocuous little text file that you can?t see. Since then, I have been tracking your every move, recording websites you clicked on, the pages you visited, and the stuff you ordered. I then used this handy little algorithm to build a profile of exactly who you are. I now know you better than your own mother. In fact, I know you better than you know yourself.

For example, I am aware that you make more than $250,000 a year, live in a posh zip code in San Francisco, belong to a fancy country club, and drive a Mercedes. You donate to Republican political causes, send your kids to a prestigious private school, and bill it all to an American Express Platinum Card. Did I leave anything out?

Because I know every detail of your life, down to your inside leg measurement, I am able to harness the power of this machine to more precisely service your every need. That includes directing advertising to you, which you have a high probability of clicking on. The more you click on my ads, the higher prices I can realize for those ads. The ad campaigns you now see are unique to your own personal computer because they are tied to your IP address. My program, called ?behavioral targeting? is the next ?big thing? in online advertising. It?s all part of the brave new world.

I see you have been shopping for a new car. Check out the new Hyundai athttp://www.hyundaiusa.com/, which offers the same quality as your existing ride, at half the price. Your clicks this morning suggest you?re taking your ?significant other? out to dinner tonight. Might I suggest Gary Danko?s on Bay Street athttp://www.garydanko.com/site/bio.html?? The rack of lamb is to die for there.

Your visits to Travelocity and Expedia tell me you?re planning a vacation. I bet you didn?t know you can find incredible deals in Las Vegas athttp://www.visitlasvegas.com/vegas/index.jsp?. Thinking about buying a condo there? They?ll even pay for the trip if you promise to check one out while you?re there.

Since we?re chatting here?mano a mano, I noticed that that last pair of jeans you ordered from?http://us.levi.com/home/index.jsp?had a 42-inch waist, up from the 40?s in your last order. Better lay off those cheeseburgers. Pretty soon, they?ll be calling you ?tubby? or ?fatso?. Better visit?http://www.weightwatchers.com/Index.aspx?soon, or the legs on that chair might buckle out from under you.

Worried about privacy? Privacy, shmivacy. There hasn?t been privacy in this country since the first social security number was handed out in 1936. And don?t expect any relief from Congress. I doubt half those dummies even know how to turn on their own PC?s.

Don?t even think about trying to delete me. I?m a ?flash cookie?, an insidious little piece of code that reinstalls every time you try that. Think of me as a toenail fungus. Once you catch me, I?m almost impossible to get rid of.

I hope you don?t mind, but I?ve been passing your personal details around to some of my buddies at other websites. That?s why when you clicked on?http://www.nfl.com/?you got deluged with product offers from your local team, the San Francisco 49ers. I?ve got friends at Google, Facebook, MySpace, and pretty much everywhere. Can I help it if I?m a popular guy? I bet the view from those 50-yard seats is great, isn?t it?

I noticed that your spending habits don?t exactly match with the income you reported on your last tax return. Do you think the IRS would like to know about that? I bet you didn?t know the agency offers a 10% reward for turning in tax cheats.

How about those triple XXX DVD?s you bought last week? Whoa! Hot, hot, hot! I hope your employer never finds out about those. It might not go down too well at your next performance review.

I thought it was lovely that you bought your spouse a two carat, yellow, vvs1, round cut diamond ring for $26,000 from?http://www.bluenile.com/?for your 30^th?wedding anniversary. But who is Lolita, the Argentine firecracker, in Miami Beach? Does the old wifey know you sent her a $2,000 pair of diamond stud earrings? What?s it worth to you for me to keep mum on this? Maybe you should take a quick peak at? 3StepDivorce.com at?http://www.3stepdivorce.com? and see what you?re in for?

Naw, I?m just pulling your leg. This is all just between friends, right? Think of it as a doctor/patient relationship. I?ll tell you what. See that leaderboard ad at the top of the page? Just click on that and we?ll call it even. Oooh that felt good! Click it again. Oh, baby! Not too many times. You?ll trigger my anti click fraud program.

Now you see that wide skyscraper add over on the right? Click on that too. Oh baby! Click it again! And there?s a little button ad at the bottom of the page. No, not that one. A little lower. What was that little cutie?s name in Miami again? Aaaaah.