Nature
Disaster
Energy
100

A large area covered mainly with trees and undergrowth 

Forest 

100

a sudden violent movement of the earth's surface, sometimes causing great damage

earthquake

100

the colour which has an environmentally-friendly impression

green

200

a current of air blowing from a particular direction

wind ( / breeze ) 

200

to cause to fill or become covered with water, especially in a way that causes problems

flood

200

high temperature, the quality of being hot

heat

300

water frozen into ice crystals and falling in light white flakes on the ground 

snow

300

a strong, dangerous wind that forms itself into an upside-down spinning cone

tornado

300

introduction of harmful materials into the environment

p_ _ _ _ _ _ _ n

pollution

400

A large ape with long red hair, native to Borneo and Sumatra. One of the endangered species. 

orangutan

400

a mass of rock and earth moving suddenly and quickly down a steep slope

landslide

400

the sun's rays as a source of energy from which power is generated

solar

500

a scientific study of life, natural science

biology

500

a large amount of ice, snow, and rock falling quickly down the side of a mountain

avalanche

500

a substance having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).

gas

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