With significant funding from the United States Department of Agriculture's Rural Business-Cooperative Service, the National Sustainable Agriculture Information Service (ATTRA) is committed to providing visitors to their site with the latest information on sustainable agriculture practices, innovation, alternative crop and livestock enterprises, and of course, organic certification. For a succinct introduction, first-time visitors will want to click on the "What is Sustainable Agriculture?" link, which leads to a number of pieces that address just that question, along with overviews of organic crop production, integrated pest management, and permaculture. After that, visitors can browse around in sections dedicated to field crops, horticultural crops, water management, livestock, and farm energy. Visitors can also sign up to receive the "Weekly Harvest" e-newsletter which is a web digest of sustainable agriculture news, resources, and funding opportunities that staff members at ATTRA have located on the internet.