Please analyze the tweet "That said–due to passing the 50yr mark awhile ago–I know most of the #horrific damage to the #planet won't occur before my 'natural' #death." and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".