[I]t can be estimated that roughly 200 million agricultural workers are chronically undernourished… Several factors have worsened the situation for plantation workers over the last twenty years… The impact of market dynamics on the working conditions of [tea] plantation workers and how this in turn leads to a violation of their right to food is examined in detail in the section on the tea sector. This sector is characterized by the concentration of market power and in particular by a very strong vertical integration, with three companies controlling 80% of global tea trade. Two of these companies (Unilever and Tata) are also the main tea packers and thus cover the most profitable segments of the chain (apart from retail). Sourcing costs for packers and retailers have gone down in the last decades. For producers, downward price pressure of plantation crops, rising oil prices and in some countries the depreciation of the US dollar against their local currencies made the tea business difficult.