the wwf has become the world's largest independent conservation organization with over 5 million supporters worldwide , in more than 100 countries. the group's objective is to halt the damage to our planet's natural environment , and build a future in which humans live in harmony with nature , the fund takes concrete action in a number of areas. for example , it works with governments to reduce poaching of tigers and to set aside lands to increase the size of tiger habitats. the WWF reports that humanity is already using nearly 50 percent more natural resources than the Earth can replace. To address this problem, it is developing and implementing new ways of growing crops, managing fisheries, forests, and wetlands, generating energy, and dealing with waste.