Which one among the following state-ments is not correct?

Statement 4 is incorrect because the world's major hot deserts are primarily located in the subtropical high-pressure belts, roughly between 15° and 30° north and south of the equator, rather than across the equator itself. The equatorial region is characterized by high rainfall and tropical rainforests [1]. Statement 1 is correct; while covering less than 6-7% of Earth's surface, tropical rainforests house more than 50% of the world's plant and animal species [2]. Statement 2 is accurate as arid and semi-arid regions cover approximately one-third of the Earth's land surface [2]. Statement 3 is also correct; phytoplankton in the ocean are responsible for producing at least 50% to 85% of the world's oxygen through photosynthesis [3].

Sources

1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 3: MAJOR BIOMES > 1. Tropical Evergreen Rainforest Biome > p. 5
2. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 8: Natural Hazards and Disaster Management > 8.62 Environment and Ecology > p. 69
3. [3] https://oceanservice.noaa.gov/facts/ocean-oxygen.html