Environmental Leader: As oil prices soared, investors looked into renewable energy. But now that oil prices have dropped below $70 a barrel, from $147 in July, the key rationale for investors to pump cash into alternative fuels has been removed, at least temporarily, Wall Street Journal reports. New Energy Finance reported that global renewable energy stocks dropped about 45 percent, compared with a 23 percent decline in the Dow Jones Industrial Average over the same period. At least in the short …