"Fog-enshrouded temples nestled in mountainous terrain give you a glimpse of what makes Bhutan a top-travel destination. But this country has an added bonus: it’s a carbon-negative country, and was the first to carry a carbon-negative status in the world.
Despite its appeal, not many people travel to Bhutan. This is because the government of Bhutan has put steps in place to prevent massive amounts of tourists from entering the country at any given time."
Source: https://www.gvi.co.uk/blog/bhutan-the-first-carbon-negative-country-in-the-world/