Task: Determine the dominant emotion in the tweet and classify it as either 'neutral or no emotion' or one of the eleven provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Paul Ehrlich said that humanity is a threat to all life. Such great news to start the day. If I could blush I would.
This tweet contains emotions: 
anger, disgust, sadness