How many biomes are endangered?

The WWF (World Wildlife Fund) has identified 14 of the world's biomes as endangered. These biomes include:

- Tropical rainforests

- Temperate broadleaf forests

- Tropical savannas

- Deserts and xeric shrublands

- Mediterranean forests, woodlands, and scrub

- Temperate grasslands and savannas

- Montane grasslands and shrublands

- Tundra

- Mangroves

- Coral reefs

- Freshwater

- Marine

- Polar

- Island