Expo 2020

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Across
  1. 4. are subjects such as biology, physics and chemistry which study things from nature
  2. 6. is a building or group of buildings where sports, entertainments and fairs take place
Down
  1. 1. is an activity that uses resources in a way which doesn't damage environment
  2. 2. sciences are things such as minerals or plants that exist in a place and are used by people
  3. 3. is energy that comes from water, wind or the sun
  4. 5. is a measure which calculates the amount of carbon dioxide somebody or something produces