The key answer of exercise 1
The key to exercise solutions in chapter 3.3 for the textbook Identity B1+ with authors Elizabeth Sharman from Oxford University Press
Question
Have you ever heard of Earth Day? When is it? What do you think it is and where is it celebrated? Read the info box and check your answers.
Answer
It's on April 22nd and is celebrated in over 180 countries worldwide. Earth Day originated in the USA in 1970 as a response to an oil spill that polluted California's coast. Since 1990, it has been observed internationally and serves as a global celebration of our natural environment.
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