The main reason why these countries have rapidly growing stockpiles of horns is believed to be the dehorning programme. "Namibia and other pro-trade rhino range states have amassed large stockpiles of rhino horn they wish to trade. Namibia's stockpiles are an estimated 6.45 tonnes of white rhino horn and an estimated 4.6 tonnes of black rhino horn. South Africa, on the other hand, likely has at least four times as much," Taylor Tench, senior wildlife policy analyst with the Environmental Investigation Agency, told the gathering. The idea is that if a rhino does not have a horn, it is of no value to poachers and so won't be killed. The horn is removed above the growth plate, just like humans cutting their nails, which means it is painless. But it also means that the horns grow back and need to be sawn off repeatedly. As a result, their stockpiles are rapidly accumulating. "The reason for not destroying the horn is speculative stockpiling, by both governments and private individuals," added Tench. "Some countries, like Kenya, destroy their rhino horn stockpiles, while others, like Namibia and South Africa, stockpile the horn in the hopes of cashing in if international trade is ever legalised."