Aakash Ranison calls himself a climate optimist, which is also the title of his new book. The 28-year-old digital influencer wants to put his skills to good use across online and offline mediums to create more awareness among people about climate change. He has over 45,000 followers on Instagram, and thousands on Twitter and YouTube, where he has conversations around climate change. He leads a minimalist life, runs his own non-profit called the Greener Earth Foundation, and has now written a book. In fact, all royalties from the book will be donated to his charity.