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Capping off a week in which he offered at least one environmental-stock idea each day, Jim Cramer told viewers of his "Mad Money" show Friday that he had saved his two best picks for last.

Cramer's weeklong "Green Day" stock theme stems from April 2, the day of a Supreme Court ruling in Massachusetts vs. the Environmental Protection Agency. The ruling made it profitable for market players to invest in environmentally friendly companies, he said.

To round his Green Day portfolio, Cramer offered two names, the first of which is

OM Group

(OMG)

.

"The word here is cobalt," he said.

OMG controls 13,000 tons of cobalt, a quarter of the world's cobalt capacity, said Cramer. This, he explained, is important because cobalt is used in the batteries found in hybrid cars. Cobalt prices should remain stable or go higher, especially since no new capacity is expected to come until 2009, he said.

But OMG is more than just cobalt, Cramer said, and what really attracted him to OMG was that in addition to being a Green Day play, it's a metals play.

OMG has copper exposure, a commodity that Cramer believes is going higher. Plus, the company's balance sheet is getting better, he said.

Moving on, Cramer named

Fuel Tech

(FTEK) - Get Report

as his "ultimate" speculative play on Green Day.

Fuel-Tech is a play on power companies "forced or incentivized to pollute less," he said. Earlier in the week, Cramer said, he told viewers that

Foster Wheeler

(FWLT)

and

Shaw Group

( SGR) were his picks for cleaner power. And they still are, for the more conservative of investors.

But for people who don't mind more risk, Fuel-Tech is the stock for them, Cramer said. It has the technology that enables power companies to burn clean coal fuel, he said. It reduces nitrogen oxide emissions and has a fuel chemistry business aimed at saving power. The company "has been getting contract after contract ever since Green Day," Cramer said.

Moreover, because coal provides more than 49% of our electricity, he said, "it's pretty important." We can't solve our problem with ethanol, he said, because it's too inefficient. Therefore, in addition to Green Day, which should force coal-burning utilities to become cleaner, Fuel-Tech is also a play on efficiency, Cramer said.

On a separate note, he told viewers it's a great time to be a bull. And even though the market is up significantly, "there is still room to run."

"I am not exaggerating when I say the best is yet to come," Cramer said. "We are going to be up 17%" this year.

Next Week's Game Plan

Although "there's not much cooking" on Monday, Cramer said, the rest of the week will be jam-packed.

On Tuesday,

VF Corp.

(VFC) - Get Report

and

Parker-Hannifin

(PH) - Get Report

report. Both of these stocks could see a nice jump, he said. VF Corp., he reminded viewers, is one of his "Benefit of the Doubt" plays. Parker-Hannifin, Cramer said, will likely ride the wave with

Eaton

(ETN) - Get Report

and

Honeywell

(HON) - Get Report

.

Wednesday is a big day, Cramer said. There are a lot of potential ways to win, but Cramer said he's only going to name five of his favorite Wednesday picks so as not to bombard people with too many names:

Akamai Technologies

(AKAM) - Get Report

,

Apple

(AAPL) - Get Report

,

Boeing

(BA) - Get Report

,

PepsiCo

(PEP) - Get Report

and

Allegheny Technologies

(ATI) - Get Report

.

Cramer believes both Apple and Akamai will be worth getting into ahead of their quarters -- Apple as a play on its new iPhone and Akamai as a way to play streaming video.

Moreover, Boeing is going to $100, he predicted, and it won't be surprising if Allegheny Tech reports a "giant number." Boeing closed at $93.29 on Friday.

Next week will be a good chance to also get into some

Exxon Mobil

(XOM) - Get Report

, Cramer said. Exxon and

Halliburton

(HAL) - Get Report

, which he owns for his

Action Alerts PLUS charitable trust, both report on Thursday.

Because Halliburton has "lagged," it could have the potential to run here, as could

Level 3 Communications

(LVLT)

, which also reports Thursday, Cramer said.

Image placeholder title

Moreover, he believes

NYSE

(NYX)

, his "growth stock of the year," should also move next week when it reports Thursday.

On Friday,

Cummins

(CMI) - Get Report

and

National Oilwell Varco

(NOV) - Get Report

report, Cramer continued, neither of which "are done going up."

Mad Mail

In the show's "Mad Mail" segment, Cramer said he considers

Lamson & Sessions

( LMS) a "natural" takeover target. He said he believes the risk/reward is 1 point down and 6 points up.

Cramer told another mailer and

CNBC

Million Dollar Portfolio Challenge player that

Charter Communications

(CHTR) - Get Report

is his favorite play for the game. He also named

Dynegy

(DYN)

and

Rite Aid

(RAD) - Get Report

as "great single-digit plays" and Level 3 Communications as a "good game name."

Lightning Round

Cramer was bullish on

Clean Harbors

( CLHB),

PG&E

(PCG) - Get Report

,

Exelon

(EXC) - Get Report

,

Dynegy

(DYN)

,

McDonald's

(MCD) - Get Report

,

Fastenal

(FAST) - Get Report

,

Home Depot

(HD) - Get Report

,

Lowe's

(LOW) - Get Report

,

Sears

(SHLD)

,

AES

(AES) - Get Report

,

Windstream

(WIN) - Get Report

,

GigaMedia

(GIGM) - Get Report

,

Boeing

(BA) - Get Report

,

Costco

(COST) - Get Report

,

Paccar

(PCAR) - Get Report

,

Cummins

(CMI) - Get Report

,

Tata Motors

(TTM) - Get Report

and

Qualcomm

(QCOM) - Get Report

.

Cramer was bearish on

Starbucks

(SBUX) - Get Report

.

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

.

Want more Cramer? Check out Jim's rules and commandments for investing from his popular book by

clicking here

.

At the time of publication, Cramer was long Halliburton and Sears Holdings.

Jim Cramer, host of the CNBC television program "Mad Money," is a Markets Commentator for TheStreet.com, Inc., and CNBC, and a director and co-founder of TheStreet.com. All opinions expressed by Mr. Cramer on "Mad Money" are his own and do not reflect the opinions of TheStreet.com 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 TheStreet.com, 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 TheStreet.com is related to the specific opinions expressed by him on "Mad Money."

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