Formula 1 World Champion Lewis hamilton He wrote that he feels like "giving up on everything" in a series of emotional messages on his social media account on Tuesday.
The Mercedes driver, who leads the season title race in pursuit of the sixth world crown, called the world "a mess" before encouraging people to go vegan Instagram History, which is no longer available for viewing.
"Honestly, I feel like giving up on everything. Shut down completely. Why worry when the world is so messy and people don't seem to care," he wrote to his 13.1 million followers.
"I'll take a moment to gather my thoughts. Thanks to you who care about the world."
Hamilton had already talked about his decision to go vegan in 2017 and invested in a herbal restaurant in London earlier this year.
He added in Instagram's story that veganism is the "only way to truly save our planet" and that he's concerned about "where this world is going".
"The extinction of our race becomes more and more likely as we use our resources. The world is a confusing place. World leaders have no education or care for the environment," he wrote.
He added, "I want my life to mean something, and honestly, so far my life has been meaningless."
His message came two days after he helped Mercedes win the sixth consecutive builders championship at the Grand Prix of Japan.
Along with concerns about the posts, his message was criticized by many pointing to his substantial carbon footprint as a Formula 1 pilot who already owned a private jet.
Hamilton has accumulated many air miles during his successful career and will have run in 21 cities around the world by the end of this season.