 PASADENA, Calif.--BUSINESS WIRE--Tetra Tech, Inc. NASDAQ: TTEK, a leading provider of high-end consulting and engineering services, announced today that the United States Agency for International Development USAID awarded the Company a five-year, 25 million single-award contract to increase renewable energy consumption and reduce deforestation in Zambia. The Alternatives to Charcoal Activity represents the flagship investment from the USAIDZambia Mission to counter climate change and co 