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.