Is Global Warming a Myth?
Global warming is the slow increase in the average temperature of the earth’s atmosphere because an increased amount of the energy (heat) striking the earth from the sun is being trapped in the atmosphere and not radiated out into space.
Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century primarily due to the greenhouse gases released by people burning fossil fuels. The earth’s atmosphere has always acted like a greenhouse to capture the sun’s heat, ensuring that the earth has enjoyed temperatures that permitted the emergence of life forms as we know them, including humans.
Without our atmospheric greenhouse, the earth would be very cold. Global warming, however, is the equivalent of a greenhouse with high-efficiency reflective glass installed the wrong way around.
Throughout its long history, Earth has warmed and cooled time and again. Climate has changed when the planet received sunlight due to subtle shifts in its orbit, as the atmosphere or surface changed, or when the Sun’s energy varied. But in the past century, another force has started to influence Earth’s climate: humanity.
The planet is getting warmer, and humans are behind it. But the question arises Global Warming a Myth?
If we look at Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes not related to human activity. Most often, the global climate has changed because of variations in sunlight. Tiny wobbles in Earth’s orbit altered when and where sunlight falls on Earth’s surface. Variations in the Sun itself have alternately increased and decreased the amount of solar energy reaching Earth. Volcanic eruptions have generated particles that reflect sunlight, brightening the planet and cooling the climate. Volcanic activity has played a major role in contributing to episodes of global warming.
These natural causes are still in play today, but their influence is too small, or they occur too slowly to explain the rapid warming seen in recent decades. We know this because scientists closely monitor the natural and human activities that influence climate with a fleet of satellites and surface instruments. Although volcanoes are active around the world and continue to emit carbon dioxide as they did in the past, the amount of carbon dioxide they release is extremely small compared to human emissions. On average, volcanoes emit between 130 and 230 million tonnes of carbon dioxide per year. By burning fossil fuels, people release more than 100 times more, about 26 billion tonnes of carbon dioxide, into the atmosphere every year (as of 2005). As a result, human activity overshadows any contribution volcanoes may have made to recent global warming.
We can take the examples of two major volcanic eruptions, El Chichon in 1982 and Pinatubo in 1991, which pumped sulfur dioxide gas high into the atmosphere. The gas was converted into tiny particles that lingered for more than a year, reflecting sunlight and shading Earth’s surface.
On the other hand, if we see the impact of increased surface temperatures is significant. But global warming will have additional, far-reaching effects on the planet. Warming modifies rainfall patterns, amplifies coastal erosion, lengthens the growing season in some regions, melts ice caps and glaciers, and alters the ranges of some infectious diseases. Some of these changes are already occurring. For most places, global warming will result in more frequent hot days and fewer cool days, with the greatest warming occurring over land. Longer, more intense heat waves will become more common. Storms, floods, and droughts will generally be more severe as precipitation patterns change. Hurricanes may increase in intensity due to warmer ocean surface temperatures
RISING SEA LEVEL, CHANGING ECO SYSTEMS, IMPACTING PEOPLE are due to global warming. For most places, global warming will result in more frequent hot days and fewer cool days, with the greatest warming occurring over land. Longer, more intense heat waves will become more common. Storms, floods, and droughts will generally be more severe as precipitation patterns change. Hurricanes may increase in intensity due to warmer ocean surface temperatures. The weather is not the only thing global warming will impact rising sea levels will erode coasts and cause more frequent coastal flooding. Some island nations will disappear. The problem is serious because up to 10 percent of the world’s population lives in vulnerable areas less than 10 meters (about 30 feet) above sea level.
Between 1870 and 2000, the sea level increased by 1.7 millimeters per year on average, for a total sea-level rise of 221 millimeters (0.7 feet or 8.7 inches). And the rate of sea-level rise is accelerating. (As per NASA)
On the flip side, there could be “winners” in a few places. For example, if the rise in global average temperature stays below 3 degrees Celsius, some models predict that global food production could increase because of the longer growing season at mid-to-high latitudes, provided adequate water resources are available. The same small change in temperature, however, would reduce food production at lower latitudes, where many countries already face food shortages. On balance, most research suggests that the negative impacts of a changing climate far outweigh the positive impacts. Current civilization—agriculture and population distribution—has developed based on the current climate. The more the climate changes, and the more rapidly it changes, the greater the cost of adaptation.
Ultimately, to be honest as per the opinion generated from the above findings, I believe that global warming will impact life on Earth in many ways, but the extent of the change is largely up to us. It is the Scientists that have shown that human emissions of greenhouse gases are pushing global temperatures up, and many aspects of climate are responding to the warming in the way that scientists predicted they would. This offers hope. Since people are causing global warming, people can mitigate global warming, if they act in time. Greenhouse gases are long-lived, so the planet will continue to warm, and changes will continue to happen far into the future, but the degree to which global warming changes life on Earth depends on our decisions now.
It does not matter whether Global warming is a hoax or not but, the truth is fighting global warming and protecting nature go hand in hand.