Simplify the following text for a Grade 11 native English-speaking person.
Original: Sustainability is an issue of major transcendence in the contemporary world , which needs to find new options for economic , social , and cultural development ; seeking an improved utilization of natural resources for the benefit of the planet and its inhabitants .
Simplified: Sustainability is an issue of major importance in the world of today . It needs to find new options for economic , social , and cultural development and a better use of natural resources for the benefit of the planet and its inhabitants .