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Blue jeans are a classic symbol of American fashion, but did you ever wonder how your blue jeans got their color?

Synthetic indigo dyes are used to give jeans their hue, but that was not always the case. Only two countries, China and Germany, currently manufacture the dyes that are used to color jeans, with China producing 90 percent.

Synthetic indigo is derived from coal tar and toxic chemicals that are fused together under conditions so extreme that making it in the United States is cost prohibitive, due to strict environmental and safety regulations.

This post is part of the Science Tuesday feature series on the USDA blog. Check back each week as we showcase stories and news from USDA’s rich science and research portfolio.

When we think about space missions, we tend to look toward the stars to planets like Mars where robotic rovers roam, gathering data and sending it back to Earth. Rarely do we think about missions closer to home. But a view of Earth from 426 miles above is helping us monitor droughts, predict floods, improve weather forecasts and assist with crop productivity.

This year, the National Aeronautics and Space Administration (NASA) launched a new satellite called SMAP (Soil Moisture Active-Passive) with the help of a team that included U.S. Department of Agriculture (USDA) hydrologist Susan Moran at the Agricultural Research Service’s (ARS) Southwest Watershed Research Laboratory in Tucson, Arizona, and physical scientist Wade Crow and hydrologist Thomas Jackson at ARS’s Hydrology and Remote Sensing Laboratory in Beltsville, Maryland.

The first step in running a successful farm or ranch business is identifying a product to create and connecting that product to potential customers.  For some new and beginning farmers, it can be a challenge to connect to the right market opportunities and to build a business that fits.

At USDA, we are working to make sure that there is access to markets at all levels - so that whether a new or beginning farmer wants to sell locally, regionally, nationally, or globally, they have access to tools that support their business and business development.

Last week, President and Mrs. Obama hosted France’s President, Francois Hollande for a State Dinner on the South Lawn of the White House. State Dinners are a way to celebrate U.S. relations with international friends and allies.  Past dinners at the White House during the Obama Administration have hosted visiting heads of state from nations including India, Mexico, China, Germany, and Great Britain.  In many ways, these events are an opportunity to demonstrate and celebrate for invited guests and the world, the cultural and culinary heritages of our country.

The State Dinner last week was an excellent example, highlighting the diversity of American agricultural and rural products that our nation has to offer. The dinner celebrated the “best of American cuisine” and featured dry-aged rib eye beef from Colorado, trout from Maine, cheese from Vermont, chocolate from Hawaii, and potatoes from New York, Idaho, and California. The wines served at the dinner included excellent selections featuring California, Washington State, and Virginia offerings. However, beyond the menu itself an equally impressive feature was the visible presence of American cut flowers that decorated and added a stunning visual touch for guests at the White House. The floral arrangements displayed at the dinner included:

Recently, USDA announced that U.S. agricultural exports for fiscal year 2013 finished at another record level, continuing the strongest five-year period for such exports in our nation’s history. Much of this success is due to small businesses, which Secretary of Agriculture Tom Vilsack noted are the backbone of the economy in rural communities, small towns and big cities.

USDA’s efforts with small businesses is helped by the work of four State Regional Trade Groups – coalitions of state departments of agriculture – that use USDA market development program funds to provide support for about 30,000 companies annually.

Travis Forgues is an organic dairy farmer in the town of Alburgh in northwest Vermont, almost at the Canadian border and surrounded on three sides by Lake Champlain. Like many of the other dairy farmers in northern Vermont, Travis is a realist. He went to college. He tried city life. But he was born into farming, and that’s how he wanted to raise his own family. So Travis went to his dad and had a talk about organic farming, and he convinced his father, and then many others, to convert their land from conventional agricultural practices to organic. As Travis saw it, organics was a growing niche within American agriculture, and consumer demand for organically produced dairy was taking off. Better still, consumers were willing to pay more for organic products. Today, as a result of Travis’ work, nearly 130 dairy farmers across New England have signed on to the “New England Pastures” organic dairy cooperative for Organic Valley.