字幕表 動画を再生する 英語字幕をプリント It's AumSum Time. What if all insects disappeared? No worries. I have their photographs. You might think insects are inconsequential, but the reality is. Without them, there probably would be no life on earth. The first life to get affected, would be plant life. Most plants in the world are angiosperms, that is, flowering plants. Without insects pollinating them, plant life would gradually disappear. Gradually, birds and mammals feeding on plants would also disappear. Further, insects are food for many birds, frogs, reptiles, etc. Without insects, they would also start dying. Then, animals eating those animals would also start dying. This would ultimately lead to a domino effect. Finally wiping out the top of the food chain, that is, human beings. Also, don't be surprised, if you suddenly see a lot of dead things everywhere. This is because insects are decomposers. Without insects, decomposition process would take much longer. What if earth lost oxygen for 5 seconds? We would need to organize a search party. No. If it was just 5 seconds. We wouldn't notice changes in our breathing. But do you know what would happen around us? Earth's crust contains 45% oxygen. Without oxygen, crust would crumble. Causing the ground to crumble and we would be in freefall. Buildings, bridges and concrete structures would crumble into dust. As oxygen is the binding agent for concrete. Cars would stop. And planes would fall from sky as their combustion engines wouldn't work without oxygen. Also, losing oxygen means losing almost 21% air pressure. This would cause our inner ear to explode, causing hearing loss. It would also become darker suddenly. Why? For sunlight to reach us, it needs to bounce off air particles like oxygen, dust etc. No oxygen means much fewer particles to bounce off, thus much darker. What if the sun disappeared? We would need a lot of flashlights. No. The sun's enormous mass and gravitational power locks the planets in their orbits. If the sun disappeared, the earth would fly off in a straight line into space. Earth would collapse into darkness only after 8 minutes. As sunlight takes about 8 minutes to reach earth. Moon would disappear as it doesn't produce light of its own. Plants would die, as no sunlight means no photosynthesis. Within a week, earth's temperature would drop below 0 degrees Fahrenheit. Dropping to negative 100 degrees Fahrenheit within a year. Making it impossible for us to survive. Ocean surfaces would freeze. However, water in the interior would stay liquid, due to heat from the Earth's core. Only microorganisms who don't require photosynthesis. Would survive by converting core's heat into the energy they need. Thus, without the sun, humans wouldn't exist. What if everyone went vegetarian? Then I will turn Pizzaterian. No. Meat industry requires a lot of land to feed and maintain livestock. This leads to deforestation and an increase in greenhouse gases. Turning vegetarian would free up that land. Restoring at least 70% of it to natural forests. Thus cooling the planet. Also, today there are around 1 billion cows. Who excrete large amounts of methane. Methane is a deadly poisonous gas, 20 times more harmful than other greenhouse gases. Cutting out meat would decrease methane in the atmosphere. Human deaths would also go down. Chronic illnesses, cancers, strokes, etc. Would drastically reduce, leading to reduced medical costs as well. However, the meat industry generates a lot of employment. We would need to think of alternative employment measures if everybody goes vegetarian. But the overall positive impact on the climate, our health and the planet cannot be ignored.