Tar: (القطران)

is a viscous black liquid derived from the destructive distillation of organic matter. Most tar is produced from coal as a byproduct of coke production, but it can also be produced from petroleum, peat or wood.

Rainforests;(الغابات المطيرة)

are forests characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1750–2000 mm (68-78inches).

Global warming:(الحترار العالمي)

is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-20th century and its projected continuation.