Barack Obama's first foreign trip as president will be to Canada in an effort to address Canadian concerns about US protectionism. Trade, clean energy technology, the global economic crisis, and the war in Afghanistan will be discussed during the one-day trip to Ottawa, although time for substantive talks will be limited. The main focus will be on trade, specifically addressing worries about the "Buy American" clause in the US economic recovery package and ensuring it does not harm Canadian firms. Obama has reassured Canadians that protectionist policies could have negative consequences. The "Buy American" provision requires that any public works project funded by the stimulus package must use only goods made in the United States, including iron and steel. Although Obama has stated that the U.S. will comply with its international trade obligations, Harper expressed concern about the wording of the clause. Canada is also worried about Obama's intention to renegotiate the North American Free Trade Agreement, as it could result in new tariff barriers. Obama aims to enhance environmental and labor regulations, and U.S. and Canadian labor unions are urging changes in various NAFTA provisions ahead of Obama's meeting with Harper. The AFL-CIO labor federation and the Canadian Labour Congress have emphasized the need to address the worsening economic crisis through coordinated efforts, including reopening and fixing flaws in the North American Free Trade Agreement. They also called for a range of complementary policies to be implemented, such as dealing with energy, climate change, green jobs, industrial policy, migration, and development. Three-way trade between the United States, Mexico, and Canada has significantly increased since NAFTA was established in 1994, with Canada and Mexico purchasing more than one-third of US exports. Despite the agreement being criticized for causing job losses in the US, the Obama administration officials have stated that the issue will not be a priority in talks with Canadian Prime Minister Harper due to the fragile state of the world economy. Obama's commitment to boosting trade between the neighboring countries, which amounts to $1.5 billion a day, will be emphasized. Obama will discuss clean energy technology with Harper and emphasize Canada's importance as a key energy supplier. Environmentalists are urging Obama to push Canada to address the environmental impact of its tar sands extraction in Alberta. Obama expressed interest in working with Canada on new technologies to reduce greenhouse gases, acknowledging the necessity of collaboration due to the US's reliance on Canadian energy. Additionally, Obama will address Canada's involvement in Afghanistan, where it has soldiers as part of a NATO-led force combatting insurgency, with Obama recently deploying more troops to the region. However, as Canada is set to remove its troops in 2011 and Obama has stated he is not going to Ottawa with a request for them to stay longer, the discussions are likely to concentrate on alternative ways for the Canadians to provide assistance. US authorities have described Thursday's meeting, occurring just a month after Obama's inauguration, as a chance for him to strengthen his personal connection with Harper, a conservative leader who had a close relationship with former President George W. Bush.