the biosphere is a fundamental basis for all human well-being and we have two 00:05:36 boundaries defined for the biosphere the first one is the conclusion that at least 50 to 60 percent of intact nature must be remained on Earth to be able to 00:05:48 support the world economy and the resilience of the entire Earth system the second boundary is for all the managed land agriculture forestry urban areas that at least 25 percent of every 00:06:00 square kilometer has to have natural levels of fluorine fauna to be able to remain healthy and support the economy