Complex sentence: Estimates of the extent of residential and commercial buildings range between 1.3% and 6% of global ice-free land area, this area is just as extensive as other small biomes such as flooded grass-lands and tropical coniferous forests.
Split into simpler sentences: Estimates of the extent of residential and commercial buildings range between 1.3% and 6% of global ice-free land area. This area is just as extensive as other small biomes such as flooded grass-lands and tropical coniferous forests.