The Planet Has Changed Over Time: Looking at Its Transformation Through History
Earth has been around for billions of years, and throughout its existence has been undergoing changes in climate, geology, biodiversity, and more. In this article, we’re going to look back over this history and explore the amazing transformations the planet has undergone over time.
The Origin of Earth
The scientific community has studied and debated, theorized and observed all manner of topics to try and understand the origin of Earth and how it has changed over time. It all began about 4.6 billion years ago, when a giant rotating cloud of dust and gas formed across the Milky Way. After further contraction, the primordial clump of hydrogen and helium that was the Earth was formed.
Rise and Fall of the Age of the Dinosaurs
As the planet cooled over millions of years, it gave rise to the first types of bacteria, which welcomed the Age of the Dinosaurs. We all know the age of the dinosaurs, creatures which roamed and grew across the planet, some reaching sizes our modern day minds have difficulties imagining. This lasted for 160 million years until the Cretaceous–Paleogene extinction event occurred some 66 million years ago, marking an end to the era of the dinosaurs.
The Rise of the Ice Age
34 million years ago, Earth began to enter the depths of an ice age, due to a large rise in global temperatures and the subsequent shift of moisture to the poles. This period lasted all the way to 2.5 million years ago. The forests were replaced by immense sheets of ice, spreading far and wide and influencing the planet in major ways.
The Emergence of Humans
If we look at the much more recent history, we can investigate how the human species has influenced and altered the planet. From about 200,000 years ago, archaeological evidence suggests the emergence of a species of animal that looked like us, Homo sapiens, appearing somewhat after the outline of modern-day humans.
The Last 200 Years: A History of Humanity’s Impact
Throughout history, the impact of humanity on planet Earth is often underestimated and overlooked. However, if we far closer to home – the last two centuries – we can see the full magnitude of the influence humans have had. From increasing global temperatures to polluting the land, air, and sea, to deforestation, the rise of cities, and draining of ecosystems, humans have had a profound effect on the planet.
Listed below are the major ways in which humanity has impacted Earth reliably over the last 200 years:
• Climate Change
In the last 200 years, there have been drastic shifts in the climate due to human activity. According to the Intergovernmental Panel on Climate Change (IPCC), this has mostly been due to an increase in the concentration of greenhouse gases in the Earth’s atmosphere, mainly from human activities such as burning fossil fuels and deforestation. This has led to a consequent rise in global temperatures and an increase in natural problems such as flooding, drought, and extreme weather patterns.
• Pollution
Due to the Industrial Revolution and increased global economic development, air and water pollution has been a major issue since the 19th century. This has led to dramatic health issues, with the World Health Organization (WHO) citing air pollution as one of the three most serious health problems in the world. In addition, pollution arising from agricultural run-off, chemical residue, and poor waste management continues to damage the planet.
• Deforestation
Throughout history, the industrialization of certain countries has led to massive deforestation problems. The loss of trees has a ripple effect, from disrupting delicate ecosystems and species extinction, to soil salinization and destabilization of the water system. It has been estimated that an area of forest the size of Brazil has been lost as a result of human activity over the last century.
• Urbanization
Societal shifts over the last two centuries have seen an influx of people migrating to cities. This has led to high-rise apartments and towering skyscrapers, the growth of extreme wealth and poverty, dramatic changes to infrastructure and the landscape, and most recently, the added problem of urban air pollution.
Conservation and Sustainability in The Modern World
In light of our current understanding of the damage that has been done to planet Earth, it is no surprise that today, all around the world, people are putting efforts into conservation and sustainability. From government policies to everyday consumer habits, there are a wealth of ways in which individuals and communities can help contribute to the sustainability of Earth.
• Cultural and Legal Policies
In certain countries, laws have been passed that call for the preservation of nature and need for citizens to be more sustainable. Japan, for example, introduced legislation in 2017 that named the Emperor of Japan as “the symbol of the State and of the unity of the People” and committed to the protection of the environment. Since then, Japan has started investing significantly in renewable energy, such as wind and solar power, and has enforced laws and regulations for businesses and industries to reduce their carbon dioxide emissions. Alternative to legal policies, in some nations like India, there also exists numerous religious and cultural views on protecting the environment, and many of these beliefs have been around for centuries and are still observed today.
• Becoming Sustainable at Home
In our personal lives, there is much that we can do to be more sustainable. This could be as extreme as going off the grid or as mundane as swapping out the lightbulbs you use in your home. Some examples of easy ways to make your home more sustainable are:
– Switching to LED lightbulbs
– Hang drying your clothes instead of using the dryer
– Installing energy-efficient appliances
– Getting appliances that use natural gas
– Lowering your water and electric bills by using water efficient fixtures
– Not leaving lights and devices on standby
– Recycling and reusing materials
Earth has gone through immense change over the last four billion years, and even in the relatively short 200 year period, humans have caused drastic shifts in climate, ecosystems and more. Today, more and more people are attempting to counter these effects, making great efforts to raise awareness and contribute to conservation and sustainability of the planet.
The history of Earth has been fascinating to investigate and continuously inspires us to ask questions and look for answers about how we got to this point, where the planet is currently, and the future of our world. Hopefully, we can go on to have a positive impact on our planet, protecting its rich resources and habitats for future generations.
