In ancient times, people built

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• 

what are natural changes to the environment?

• Heavy rainfall

• Rivers

• Wind

• Earthquakes

• Building roads and houses

Heavy rainfall causes

• damage to mountains and hills

• destruction of houses and roads

Bursting rivers can cause

• flooding

• oil fields

strong wind blows can cause

• damage to trees and overbuilt structures

• damage to mountains and hills

Earthquakes can cause

• destruction of houses and roads

• flooding

People change in the environment

• 
• Rivers

people change in the environment

• 
• strong wind blows

building roads and highways are

• natural changes

• people changes

building houses, office blocks and skyscrapers are

• natural changes

• people changes