massive land purchases creates hostility

The Nature Conservancy has attracted billions of dollars of private money from wealthy people and World Bank environment cash to buy or lease national parks and tracts of land in poor countries around the world. The Nature Conservancy is then allowed to collect money for property use, employ police, build hotels and, in many cases, dictate how land inside the parks should be used, and even whether communities can live or hunt there. This causes hostility among the people who live there. Some foreign governments that eventually caught on to the long term effects of this type of massive land sale and denounce these actions as "eco-colonialism".

See http://www.guardian.co.uk/environment/2008/feb/13/conservation