Introduction:
Plants play a crucial role in maintaining the balance of ecosystems and supporting life on Earth. They are the primary producers and provide food, oxygen, and various resources for other organisms. If all plants were to perish from the Earth, it would have catastrophic consequences for both the environment and all living beings.

Impact on the Environment:
1. Loss of Oxygen: Plants are responsible for producing a significant amount of the Earth's oxygen through photosynthesis. Without plants, the oxygen levels in the atmosphere would decrease rapidly, making it difficult for oxygen-dependent organisms, including humans, to survive.
2. Disruption of Food Chains: Plants form the base of most food chains and provide food for a wide range of organisms. If plants were to disappear, herbivores would lose their primary source of nutrition, leading to a decline in their populations. This, in turn, would affect the populations of their predators, causing a disruption in the entire food chain.
3. Loss of Habitat: Plants provide shelter, nesting sites, and habitats for numerous animals, insects, and microorganisms. The disappearance of plants would result in the loss of these habitats, leading to a decline in biodiversity and potential extinctions.
4. Soil Erosion: Plant roots help bind the soil, preventing erosion caused by wind and water. Without plants, the soil would become vulnerable to erosion, resulting in the loss of fertile land and affecting agricultural productivity.

Impact on Humans:
1. Lack of Food: Plants are a primary source of food for humans. The loss of plants would lead to a severe shortage of fruits, vegetables, grains, and other plant-based food sources, causing widespread famine and malnutrition.
2. Economic Consequences: Many industries rely on plants for raw materials, such as timber, fibers, and medicinal plants. The loss of plants would impact these industries, resulting in economic downturns and unemployment.
3. Climate Change: Plants play a crucial role in regulating the Earth's climate by absorbing carbon dioxide through photosynthesis. Without plants, the levels of carbon dioxide in the atmosphere would rise, exacerbating climate change and its associated impacts.
4. Health Issues: Plants also provide medicinal resources, and their absence would limit the availability of natural remedies for various diseases. Additionally, the lack of plants would negatively impact air quality, as they help remove pollutants and release oxygen.

Conclusion:
The extinction of all plants would have dire consequences for the environment, ecosystems, and human survival. It would disrupt the balance of nature, lead to the loss of biodiversity, and cause widespread food shortages, economic crises, and health issues. Protecting and conserving plants is essential for the well-being of our planet and all its inhabitants.