The conversation between human and AI assistant.
[|Human|] Create a tweet summarizing the following news article in 140 characters or less.
[|AI|] Greta Thunberg addresses climate crisis & calls for global school strike to stand up to political inaction at a rally in Switzerland. #ClimateChange #GretaThunberg #YouthStrike4Climate
[|Human|] 
Create a tweet summarizing the following news article in 140 characters or less.