Complex sentence: It covers 8.7% of the Earth's total surface area (or 30% of its land area) and with approximately 4.3 billion people, it hosts 60% of the world's current human population.
Split into simpler sentences: It covers 8.7% of the Earth's total surface area and comprises 30% of its land area. With approximately 4.3 billion people, it hosts 60% of the world's current human population.