Question

plants are essential part of earth.what would happen if all the green plants are wiped from earth.Plz answer in briefly

Answer 1

If all green plants were removed from Earth, it would return to approximately the same condition it was in for the great majority of its existence. Green plants are a relative newcomer. Land plants with vascular tissue (the common ancestor of clubmosses, ferns, horsetails, conifers, and flowering plants) arose less than 450 million years ago, and non-vascular plants (like liverworts and mosses) arose less than 500 million years ago. During the preceding 4 billion years - 90% of Earth's existence - there were no plants. Other photosynthesizing organisms like cyanobacteria arose about 2.5 billion years and algae about 1.7 billion years ago. They were, and still are, the major oxygen-producers.

Without the stabilizing influence of land plants and their roots, the terrestrial landscape would experience accelerated erosion by rain and wind, producing a world of gullies and dust storms. Microbial crusts composed of cyanobacteria, algae, and lichens would be the only soil stabilizers (though far less efficient than plants). While most mammals, birds, and insects would be gone, many species would continue in the oceans and other aquatic habitats where phytoplankton (mostly algae) are the primary producers.

There are three trillion trees in the world. The timber industry currently cuts down 15 billion a year, so at current rates it would take at least 200 years to fell them all – probably much longer because a lot of virgin forest is hard to reach. If you gave everyone aged 15 to 65 a chainsaw, they would have to cut down 625 trees each, which might be manageable in a year. But collecting and processing that timber would take much longer and 99 per cent of the trees would just lie on the forest floor, rotting and releasing 35 billion tonnes of CO2


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