Cramer's 'Mad Money' Recap: It's Easier Being Green

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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.