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The world is going to spend more to be cleaner and investors need look no further than the BASF's ( BF) recent bid for Engelhard ( EC), Jim Cramer said on Wednesday's "Mad Money" TV show.

BASF, the world's largest chemical company, wants Engelhard because it makes emissions-control systems that companies need to comply with environmental regulations, said Cramer, who pooh-poohed the idea that the German firm wanted Engelhard for its auto-parts business. Let's take this deal and draw inspiration from it.

Companies that make dirty things clean are tremendously undervalued, Cramer said, and environmental regulations are only getting tougher.

He said that to get in on the trend, viewers should look at four clean-up companies including KFx ( KFX), which turns low-energy coal into high-energy fuel without violating pollution standards.

He also recommended Pall ( PLL), which makes filters used for purposes ranging from semiconductors and planes to blood and cardio filtration, and Calgon Carbon ( CCC), a hazardous-waste engineering company that takes care of water purification.

But if there's one stock in the sector he said investors should pick up, it's ADA-ES ( ADES), which works with utilities companies to meet regulatory demands.

State environmental laws are getting tougher, which should help companies in this sector.

Cramer also wanted to give viewers a piece of the energy sector that hasn't been played out, so he said to check out PW Eagle ( PWEI)

The PVC pipe maker is a buy because it makes the pipes that move natural gas, said Cramer, who called it a business with late-stage leverage.

The stock went up a lot last year, but Cramer believes it's still cheap and has room to grow.

Don't Feed the Lemmings

Cramer also encouraged viewers to make money off of the stupidity and laziness of the masses of bad investors running around Wall Street.

The difference between a winning and losing player is the difference between someone who does their homework and someone who is lazy, he said.

He called poorly advised, ignorant investors lemmings because they often follow the crowd and just put their money in last year's best-performing mutual fund.

How can this work in one's favor?

Cramer said that last year's best-performing mutual fund, ( FCNTX) Fidelity Contrafund, is destined to get a ton of new cash as the lemmings pour in.

"Any stock bought by Contrafund will move," Cramer said. And right now, Contrafund is buying Gilead Sciences ( GILD).

He said to pick it up as a trade, not as a long-term buy.

Mad Mail

Reaching into the "Mad Money" mailbag, Cramer told a viewer interested in the superconductor business to stick with Intermagnetics General ( IMGC) and not to buy American Superconductor ( AMSC). He added that Intermagnetics should be owned for the MRI and medical devices business, and that the superconductor unit is just gravy.

Cramer also said Google ( GOOG) is still a buy, but that he'd sell at $500.

Lightning Round

Cramer was bullish on Wal-Mart ( WMT), Abercrombie & Fitch ( ANF), IBM ( IBM), Darden Restaurants ( DRI), Chesapeake Energy ( CHK), Monsanto ( MON), Cincinnati Bell ( CBB), Celgene ( CELG), UnitedHealth Group ( UNH), Intel ( INTC) Nabors Industries ( NBR), Halliburton ( HAL), Pilgrim's Pride ( PPC), ING ( ING), GameStop ( GME), Lan Airlines ( LFL), Under Armour ( UARM), Newell Rubbermaid ( NWL)and Whole Foods ( WFMI).

Cramer was bearish on McDonald's ( MCD), Commercial Metals ( CMC), Qwest Communications ( Q), HealthExtras ( HLEX), Psychiatric Solutions ( PSYS), GMX Resources ( GMXR), Acuity Brands ( AYI), National Instruments ( NATI)and Fresh Del Monte ( FDP).

For more of Cramer's insights during the Lightning Round, click here .

Want more Cramer? Check out Jim's rules and commandments for investing from his latest book by clicking here.

At the time of publication, Cramer was long GameStop, Halliburton, Intel, UnitedHealth Group.

Jim Cramer, host of the CNBC television program "Mad Money," is a Markets Commentator for, Inc., and CNBC, and a director and co-founder of All opinions expressed by Mr. Cramer on "Mad Money" are his own and do not reflect the opinions of or its affiliates, or CNBC, NBC UNIVERSAL or their parent company or affiliates. Mr. Cramer's opinions are based upon information he considers to be reliable, but neither, nor CNBC, nor either of their affiliates and/or subsidiaries warrant its completeness or accuracy, and it should not be relied upon as such. Mr. Cramer's statements are based on his opinions at the time statements are made, and are subject to change without notice. No part of Mr. Cramer's compensation from CNBC or is related to the specific opinions expressed by him on "Mad Money."

None of the information contained in "Mad Money" constitutes a recommendation by Mr. Cramer, or CNBC that any particular security, portfolio of securities, transaction, or investment strategy is suitable for any specific person. You must make your own independent decisions regarding any security, portfolio of securities, transaction, or investment strategy mentioned on the program. Mr. Cramer's past results are not necessarily indicative of future performance. Neither Mr. Cramer, nor, nor CNBC guarantees any specific outcome or profit, and you should be aware of the real risk of loss in following any strategy or investments discussed on the program. The strategy or investments discussed may fluctuate in price or value and you may get back less than you invested. Before acting on any information contained in the program, you should consider whether it is suitable for your particular circumstances and strongly consider seeking advice from your own financial or investment adviser.

Some of the stocks mentioned by Mr. Cramer on "Mad Money" are held in Mr. Cramer's Action Alerts PLUS Portfolio. When that is the case, appropriate disclosure is made on the program and in the "Mad Money" recap available on The Action Alerts PLUS Portfolio contains all of Mr. Cramer's personal investments in publicly-traded equity securities only, and does not include any mutual fund holdings or other institutionally managed assets, private equity investments, or his holdings in, Inc. Since March 2005, the Action Alerts PLUS Portfolio has been held by a Trust, the realized profits from which have been pledged to charity. Mr. Cramer retains full investment discretion with respect to all securities contained in the Trust. Mr. Cramer is subject to certain trading restrictions, and must hold all securities in the Action Alerts PLUS Portfolio for at least one month, and is not permitted to buy or sell any security he has spoken about on television or on his radio program for five days following the broadcast.

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