Here is a quote from WWF's website:
For 60 years, WWF has worked to help people and nature thrive. As the world's leading conservation organization, WWF works in nearly 100 countries. At every level, we collaborate with people around the world to develop and deliver innovative solutions that protect communities, wildlife, and the places in which they live.
WWF's goal is to: Build a future where people live in harmony with nature.
The WHO was founded in 1948.