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Energy
- Energy knowledge
- The energy system
- Oil
- Coal
- Natural gas
- Nuclear
- Biomass
- Hydroelectric
- Solar
- Wind
- Geothermal
- Hydrogen
Air
- Air knowledge
- Air pollution
- Air in motion
- Climate changes
- Meteorology knowledge
Water
- Water knowledge
- Water pollution
- Ice and glaciers
- Cryosphere
Earth
- Soil
- Landscapes
- Caves
- Subsoil
Life
- Beginning of life
- Bacteria
- Protista
- Fungi
- Plants
- Animals
- Biodiversity
Ecosystems
- What is an ecosystem
- Coral Reef
- Desert
- Temperate Forest
- Rain Forest
- Mediterranean Scrub
- Savannah
- Steppe
- Taiga
- Tundra
Space
- Solar System
- Stars
- Universe
- Space Exploration

multimedia

All the Graphs and Tables

The red squirrel and the grey squirrel

Average temperature in the taiga

Legislation alien species

Maximum and minimum temperatures

Competition between two species

Protected areas in Findlandia

Precipitation in the various biomes

Coniferous wood

Lichens