# Chapter 21 - Coal - the black gold

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The history of a special material.
Grammar unit: Conditional clauses introduced by wenn

Season 0 / Episode 4 Oct 2007 English South Africa Health & Fitness

The history of a very special material.Grammar unit: Relative clauses

Season 1 / Episode 18 14 min

The re-united Germany: People and their personal experiences.Grammar unit: subordinate clauses introduced by obwohl

Season 1 / Episode 6 14 min

Dr. Thürmann shows Andreas his hometown.Grammar unit: Comparison of adjectives

Season 1 / Episode 17 14 min

The history of a special material.Grammar unit: Conditional clauses introduced by wenn

Season 1 / Episode 21 14 min

A region presents itself.Grammar unit: No new grammar in this lesson

Season 1 / Episode 22 14 min

All episodes