In an effort to respond to growing consumer awareness of food provenance, the fast-food chain changed its supplier of both coffee beans and milk. UK chief executive Steve Easterbrook said: "British consumers are increasingly interested in the quality, sourcing, and ethics of the food and drink they buy". In a bid to tap into the ethical consumer market, McDonald's switched to using coffee beans taken from stocks that are certified by the Rainforest Alliance, a conservation group. Additionally, in response to pressure, McDonald's UK started using organic milk supplies for its bottled milk and hot drinks, although it still uses conventional milk in its milkshakes, and in all of its dairy products in the United States. According to a report published by "Farmers Weekly" in 2007, the quantity of milk used by McDonald's could have accounted for as much as 5 percent of the UK's organic milk output.