There are seven main land biomes.
Everyone alive on the planet today lives in one massive biome: Earth, especially when viewed from space.
A biome basically represents an ecological community categorized by its physical characteristics: soil, climate, and the life it supports. While Earth can be considered as one biome, it's normally subdivided into additional biomes.
Scientists separate biomes into two distinct classifications: aquatic and terrestrial. The largest biome on Earth is the aquatic one, as water covers 75 percent of the globe. Further scientific cataloguing leads to multiple eco-regions across the globe.
Rainforests are home to over half the world's plant and animal species. They support very diverse plant and animal life due to their seasonally warm temperatures and abundant rainfall.
One third of the Earth's stored carbon is in arctic tundra soil. The soil remains frozen year round, known as permafrost.
Antartica is actually the world's largest desert. Many mistake it for a tundra biome, but overall it is classified as a desert due to its extremely low annual precipitation.