* Length is the approximate time to complete the lesson, including exercises and videos.
About this training
There is a three minute audio about the problem of space debris, caused when satellites break up into small pieces and fall to earth. This adds to existing difficulties with pollution of our air, land and water. Scientists the world over are working on possible solutions to this growing problem. The audio is followed by a written transcription and list of key words. There are three self-study exercises to test comprehension and usage of verbs.