Top 10 Most Profitable Environmental Stocks: CREG, NTIC, SRCL, TRIT, WCN, ECOL, DCI, PESI, WM, MPR (Jan 11, 2012)

Below are the top 10 most profitable Environmental stocks for the last 12
months. Two Chinese companies (CREG, TRIT) are on the list. China Recycling
Energy Corp. (NASDAQ:CREG) is the 1st most profitable stock in this segment of
the market. Its net profit margin was 39.45% for the last 12 months. Its
operating profit margin was 49.05% for the same period. Northern Technologies
International Corp (NASDAQ:NTIC) is the 2nd most profitable stock in this
segment of the market. Its net profit margin was 20.46% for the last 12 months.
Its operating profit margin was 23.69% for the same period. Stericycle, Inc.
(NASDAQ:SRCL) is the 3rd most profitable stock in this segment of the market.
Its net profit margin was 13.74% for the last 12 months. Its operating profit
margin was 24.82% for the same period. Tri-Tech Holding, Inc. (NASDAQ:TRIT) is
the 4th most profitable stock in this segment of the market. Its net profit
margin was 13.12% for the last 12 months. Its operating profit margin was 15.66%
for the same period. Waste Connections, Inc. (NYSE:WCN) is the 5th most
profitable stock in this segment of the market. Its net profit margin was 11.25%
for the last 12 months. Its operating profit margin was 21.24% for the same
period. US Ecology Inc. (NASDAQ:ECOL) is the 6th most profitable stock in this
segment of the market. Its net profit margin was 10.60% for the last 12 months.
Its operating profit margin was 19.03% for the same period. Donaldson Company,
Inc. (NYSE:DCI) is the 7th most profitable stock in this segment of the market.
Its net profit margin was 10.18% for the last 12 months. Its operating profit
margin was 14.00% for the same period. Perma-Fix Environmental Services, Inc.
(NASDAQ:PESI) is the 8th most profitable stock in this segment of the market.
Its net profit margin was 8.19% for the last 12 months. Its operating profit
margin was 13.26% for the same period. Waste Management, Inc. (NYSE:WM) is the
9th most profitable stock in this segment of the market. Its net profit margin
was 7.79% for the last 12 months. Its operating profit margin was 15.58% for the
same period. Met-Pro Corporation (NYSE:MPR) is the 10th most profitable stock in
this segment of the market. Its net profit margin was 7.06% for the last 12
months. Its operating profit margin was 10.14% for the same period.