Greta Thunberg (2003), Sweden | $10K

Greta Thunberg is a sensitive child who was greatly agitated at the ongoing global warming situation and came forward as the world’s youngest environmentalist. The 15-years-old activist got a chance to address the United Nations Climate Change Conference and the Climate Action Summit. She led countrywide protests against the government to fulfill the promises of climate betterment.

Her source of income is prize money and book deals, and she earns $120K annually. Her estimated net worth is around $100K, and she loves to spend a part of her income on charity work. An Honorary Fellowship of the prestigious Royal Scottish Geographical Society is among many honors she won.