President Barack Obama emphasized the importance of a strong government commitment to scientific research in response to the flu virus outbreak that has caused a public health emergency in the US. In a speech to the National Academy of Sciences, Obama called for dedicating 3 percent of the gross domestic product to scientific research, stating that our ability to address public health challenges relies heavily on the work of the scientific and medical community. He highlighted the need for the nation to prioritize science and research to prevent falling behind in the face of such challenges. Obama reassured the public that US cases of swine flu were not a reason to panic, but the government was closely monitoring the situation. The administration declared a public health emergency as a precautionary measure. The flu has caused 149 deaths in Mexico and has spread to North America and Europe, causing concerns of a potential pandemic. Obama referenced the space race between the US and Soviet Union in the 1950s and 1960s as an example of the importance of investing in research, noting that science spending as a percentage of GDP has declined since that time. Obama stated that by aiming to spend more than 3 percent of GDP on science, the United States will surpass the level reached during the space race. This goal includes both public and private spending, with the country currently allocating 2.66 percent of GDP to research and development. The increased spending is partially included in the economic stimulus package signed by Obama in February. Additionally, Obama's proposed fiscal 2010 budget includes making tax credits for business investment in research and development permanent. The White House is emphasizing Obama's achievements as he approaches the 100-day mark of his presidency, including his proposals to address global climate change. Obama views breaking dependence on fossil fuels as a crucial challenge for this generation. The administration has also started a two-day meeting of major world economies on climate change, with a goal of reducing US emissions by around 15 percent by 2020 through a cap-and-trade system. This proposal is central to a bill currently being considered in Congress. Republicans have been critical of the cap-and-trade system, labeling it as a disguised energy tax. Additionally, some moderate Democrats share concerns about the potential negative effects of the plan on employment and the economy.