Economy of Iran spices including cumin and sumac. Iran is the world's largest producer of saffron, pistachios, honey, berberis and berries and the second largest date producer. Meat and dairy products include lamb, goat meat, beef, poultry, milk, eggs, butter, and cheese. Non-food products include wool, leather, and silk. Forestry products from the northern slopes of the Alborz Mountains are economically important. Tree-cutting is strictly controlled by the government, which also runs a reforestation program. Rivers drain into the Caspian Sea and are fished for salmon, carp, trout, pike, and sturgeon that produce caviar, of which Iran is the largest producer. Since the
Saffron bun areas and by Swedish-speaking Finns, as well as in Norway and more rarely in Denmark. Most commercially available saffron buns and cakes today contain food dyes that enhance the natural yellow provided by saffron. The very high cost of saffron - the world's most expensive spice by weight - makes the inclusion of sufficient saffron to produce a rich colour an uneconomical option. The addition of food colouring in Cornish saffron buns was already common by the end of the First World War when the scarcity of saffron tempted bakers to find other ways to colour their products. Saffron bun