Top 10 Most Efficient Environmental Stocks: CREG, NTIC, IDSA, ECOL, WCN, WM, SRCL, CLH, MPR, RSG (Mar 30, 2011)

Below are the top 10 most efficient Environmental stocks, UPDATED TODAY before 4:30 AM ET, based on earnings per employee for the last 12 months. One Chinese company (CREG) is on the list.

China Recycling Energy Corp. (NASDAQ:CREG) is the 1st most efficient company in this segment of the market. Its earnings per employee was $60,865 for the last 12 months. Its revenue per employee was $257,780 for the same period. Northern Technologies International Corp (NASDAQ:NTIC) is the 2nd most efficient company in this segment of the market. Its earnings per employee was $52,628 for the last 12 months. Its revenue per employee was $261,248 for the same period. Industrial Services of America, Inc. (NASDAQ:IDSA) is the 3rd most efficient company in this segment of the market. Its earnings per employee was $42,382 for the last 12 months. Its revenue per employee was $1,805,291 for the same period. US Ecology Inc. (NASDAQ:ECOL) is the 4th most efficient company in this segment of the market. Its earnings per employee was $34,011 for the last 12 months. Its revenue per employee was $283,341 for the same period. Waste Connections, Inc. (NYSE:WCN) is the 5th most efficient company in this segment of the market. Its earnings per employee was $24,708 for the last 12 months. Its revenue per employee was $239,521 for the same period.

Waste Management, Inc. (NYSE:WM) is the 6th most efficient company in this segment of the market. Its earnings per employee was $23,411 for the last 12 months. Its revenue per employee was $292,407 for the same period. Stericycle, Inc. (NASDAQ:SRCL) is the 7th most efficient company in this segment of the market. Its earnings per employee was $23,178 for the last 12 months. Its revenue per employee was $158,523 for the same period. Clean Harbors, Inc. (NYSE:CLH) is the 8th most efficient company in this segment of the market. Its earnings per employee was $18,673 for the last 12 months. Its revenue per employee was $253,106 for the same period. Met-Pro Corporation (NYSE:MPR) is the 9th most efficient company in this segment of the market. Its earnings per employee was $17,540 for the last 12 months. Its revenue per employee was $253,901 for the same period. Republic Services, Inc. (NYSE:RSG) is the 10th most efficient company in this segment of the market. Its earnings per employee was $16,917 for the last 12 months. Its revenue per employee was $270,220 for the same period.