Answer:
Air pollution, Chances of forrest fire (causing damages to ecosystems and wildlife habitation. Also damages to homes that are in Forrest's), This also causes severe damage to timber crops. More disadvantages are: damaging vegetation, degrading water, deteriorating soils, and toxic gases.
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Any word or phrase of which is used to move from one idea to the next are called transitions.
Transitions are used to clarify connections that you want to stress in your writing.
The type of details used in this sentence is chronological details - Stone Age happened first, and it was followed by Bronze Age and Iron Age.