What Is Happening to Our Planet?
A comprehensive educational overview of Earth's changing climate — from the Industrial Revolution to April 2026.
Published: April 26, 2026 | Educational Article
What Is Climate Change?
Climate change refers to long-term shifts in global temperatures and weather patterns. While some degree of climate variation is natural, since the mid-20th century, human activities have become the dominant cause of these changes. The burning of fossil fuels — coal, oil, and natural gas — releases carbon dioxide (CO₂) and other greenhouse gases into the atmosphere. These gases trap heat from the sun, causing the planet to warm gradually. This process is commonly called the greenhouse effect.
When we talk about climate change today, we are mostly referring to the rapid warming of Earth's average surface temperature caused by human-made greenhouse gas emissions. This warming has wide-ranging consequences: melting ice caps, rising seas, more intense storms, prolonged droughts, and the extinction of plant and animal species.
A Brief History: How Did We Get Here?
The roots of today's climate crisis trace back to the Industrial Revolution of the late 1700s and early 1800s. Coal-powered factories and steam engines multiplied rapidly across Europe and North America, kicking off a new era of human-driven carbon emissions. By the late 1800s, scientists had already begun noticing that certain atmospheric gases could trap heat — laying the scientific foundation for what we now call climate science.
The 20th century brought oil and natural gas into widespread use, fueling automobiles, aircraft, industry, and electricity generation. As global population grew and economies expanded, so did emissions. By the 1970s and 1980s, scientific consensus around human-caused warming was solidifying. In 1988, the Intergovernmental Panel on Climate Change (IPCC) was established by the United Nations to assess climate science and guide international policy.
The 1990s saw the first major international efforts to tackle emissions. The United Nations Framework Convention on Climate Change (UNFCCC) was adopted in 1992 at the Rio Earth Summit. The Kyoto Protocol of 1997 set binding emissions reduction targets for developed nations. However, actual progress was slow, and emissions continued to rise globally.
The Paris Agreement: A Global Turning Point
In December 2015, at COP21 in Paris, 196 countries adopted the Paris Agreement — a landmark international treaty that aimed to limit global average temperature rise to well below 2°C above pre-industrial levels, with efforts to limit warming to 1.5°C. Each country committed to nationally determined contributions (NDCs): their own plans for reducing emissions and building resilience to climate impacts. The agreement also created a mechanism for countries to regularly update and strengthen their targets over time.
The Paris Agreement was celebrated as a diplomatic breakthrough. For the first time, all major emitting nations — including the United States, China, India, and the European Union — were united under a single climate framework. However, critics noted that the initial NDCs were not nearly ambitious enough to actually meet the 1.5°C target. Emissions continued to rise in the years that followed, and extreme weather events became more frequent and intense.
Glaciers around the world are retreating at an accelerating rate. The Conejeres Glacier in Colombia was declared extinct in 2024, and all glaciers in Venezuela have either disappeared or are critically endangered.
The Science: What the Data Tells Us
The evidence for human-caused climate change is overwhelming and comes from multiple independent lines of scientific research. Earth's average surface temperature has risen by approximately 1.2°C above pre-industrial levels since the late 19th century. The last decade was the hottest on record. The year 2024 was the warmest year in 175 years of temperature record-keeping. Remarkably, 2025 came in as the second-hottest year ever — despite occurring during a La Niña event, which typically brings cooler conditions to Earth's surface.
Atmospheric carbon dioxide has reached over 152% of its 1750 level — the highest concentration in at least 800,000 years, according to ice core data. Methane and nitrous oxide levels have also risen dramatically due to agriculture, livestock, landfills, and fossil fuel extraction. These gases collectively amplify the greenhouse effect far beyond what CO₂ alone would cause.
The oceans absorb roughly 90% of the excess heat trapped by greenhouse gases, and globally averaged sea surface temperatures have reached their warmest levels in modern records. Ocean heat content reached a new record in 2025 — for the ninth consecutive year in a row. Warmer oceans fuel more powerful hurricanes and cyclones, disrupt marine ecosystems, and accelerate the bleaching and death of coral reefs. Between 1985 and 2024, mean sea surface temperature over coral reef areas increased by over 1°C, and Caribbean hard coral cover declined by 48% from 1980 to 2024.
Melting Ice and Rising Seas
One of the most dramatic and visible consequences of climate change is the melting of polar ice and mountain glaciers. The Arctic is warming nearly four times faster than the global average. Arctic sea ice extent has declined sharply over the past few decades, affecting ecosystems that depend on ice — from polar bears and walruses to indigenous communities that rely on frozen terrain for transportation and hunting.
The Greenland and Antarctic ice sheets are losing mass at accelerating rates, contributing to rising sea levels. Combined with the thermal expansion of warming ocean water, global sea levels have risen to their highest point in the satellite record, which began in 1993. Coastal communities around the world are already experiencing more frequent flooding, storm surges, and shoreline erosion. Low-lying island nations in the Pacific are facing existential threats as their land slowly disappears beneath the rising ocean.
Sea level rise and intensifying storms are increasing the frequency and severity of coastal flooding worldwide. Millions of people live in areas at risk of permanent inundation by mid-century.
Extreme Weather: The New Normal
Climate change is not a distant future problem — its effects are already reshaping life on Earth. The warming atmosphere holds more moisture, leading to heavier rainfall events and catastrophic floods in some regions, while other areas face prolonged drought. The hydrological cycle has become more erratic, with extreme weather events becoming more frequent and intense.
Wildfires have grown in scale and ferocity. The 2025 Los Angeles wildfires were among the most destructive in California's recorded history, burning through residential neighborhoods and forcing mass evacuations. Extreme heat events that were once considered rare are becoming regular occurrences across Europe, Asia, South Asia, and the Americas. Heat kills more people than any other weather-related disaster, and rising temperatures are making outdoor labor increasingly dangerous.
Food security is also threatened. Extreme weather is raising food prices worldwide as droughts, floods, and heat stress reduce crop yields. Changing rainfall patterns affect irrigation and freshwater availability. Climate change is also accelerating groundwater depletion, increasing risks to agriculture and urban water supplies. At the same time, rising temperatures are creating more favorable conditions for disease-carrying mosquitoes, spreading dengue fever into regions where it was previously unknown.
Biodiversity Under Threat
Climate change and biodiversity loss reinforce each other in a destabilizing feedback loop. As temperatures rise, species that cannot adapt quickly enough face extinction. Habitats shift, fragment, and disappear — from tropical rainforests to alpine meadows to coral reefs. Marine, terrestrial, and freshwater ecosystems are all being altered at a pace that outstrips the ability of many species to migrate or evolve.
Forests play a crucial role in absorbing carbon dioxide from the atmosphere. The world's forests hold roughly 870 gigatonnes of carbon — nearly twice the amount emitted from burning fossil fuels since 1850. But deforestation, driven by agriculture, logging, and development, is releasing that stored carbon back into the atmosphere. Protecting and restoring forests is therefore one of the most powerful tools available to fight climate change.
Fungi, insects, soil microbes, and other organisms that form the foundation of ecosystems are also being disrupted. For example, a fungal pathogen that had successfully controlled the destructive spongy moth in North American forests is becoming less effective as hotter, drier conditions reduce its potency — an example of how climate change undermines even our natural defenses.
Global Responses and International Action
International climate negotiations have continued at an intense pace throughout the 2020s. The third generation of Nationally Determined Contributions (NDCs), submitted in 2025, were described by the United Nations as the most ambitious ever. Many countries have accelerated their targets to reach net-zero emissions — meaning they would remove as much carbon from the atmosphere as they emit — by mid-century.
COP30, the 2025 United Nations Climate Change Conference, was held in Belém, Brazil, with the goal of accelerating climate action and ensuring a "just transition" away from fossil fuels that supports workers and communities. For the first time, a formal COP decision acknowledged that the world might overshoot the 1.5°C target and that both the extent and duration of that overshoot need to be minimized. However, none of the last three UN climate summits firmly endorsed phasing out fossil fuels or adopted strong measures to monitor emissions, drawing criticism from scientists and activists.
The UN Environment Programme's Emissions Gap Report 2025, titled "Off Target," concluded that full implementation of current national climate targets would still allow global temperature to rise by 2.3 to 2.5°C this century. Under current policies without strengthening, warming could reach 2.8°C — far above the 1.5°C goal and dangerously above the 2°C threshold that scientists warn could trigger irreversible tipping points in Earth's climate system.
The Clean Energy Revolution
Despite the challenges, there is meaningful progress in the transition to clean energy. Solar and wind power have experienced explosive growth over the past decade. Since 2015, their combined share of global electricity generation has more than tripled. In the European Union, wind and solar provided 30% of all electricity in 2025 — surpassing fossil fuels (29%) for the first time, and outproducing them in 14 of 27 EU member states.
Electric vehicles have surged from less than 1% of passenger car sales a decade ago to more than one-fifth today. In China, EVs are now cheaper to buy than fossil-fuel-powered cars, in addition to being cheaper to fuel and maintain. Battery storage technology has improved dramatically, making it possible to store solar and wind energy and dispatch it when needed — solving one of the key challenges of intermittent renewable energy.
In the United States, clean energy sources accounted for over 90% of all new power capacity additions in 2025, driven by the falling costs of solar panels and batteries, despite the Trump administration's efforts to promote fossil fuel expansion. The International Energy Agency forecasts that global electric vehicle adoption will continue to accelerate through 2026 and beyond. Investments in clean energy supply surpassed investments in fossil fuels for the second consecutive year in 2024.
Solar energy is now one of the cheapest sources of electricity in history. In 2025, clean energy accounted for over 90% of new power generation added in the United States.
The Political Landscape in 2026
Climate policy has become increasingly polarized in some countries. In the United States, the Trump administration took sweeping actions in 2025 to roll back federal climate regulations. It moved to dismantle leading climate research centers, deleted climate information from federal government websites, withdrew U.S. participation from international climate commitments, and blocked many wind and solar energy projects on federal lands. The U.S. Environmental Protection Agency formally rescinded the Endangerment Finding in February 2026 — the scientific and legal basis for regulating greenhouse gas emissions as a threat to human health and welfare.
At the same time, surveys show that 59% of registered American voters would prefer to vote for candidates who support action on global warming, suggesting a gap between current policy direction and public preference. Meanwhile, the scientific community has grown more vocal about the urgency of the crisis. In November 2025, a report from the American Association for the Advancement of Science concluded that the remaining carbon budget to limit warming to 1.5°C is "virtually exhausted" — equivalent to only about four years of emissions at 2025 levels.
China, which is responsible for about one-third of global greenhouse gas emissions, is pursuing a dual strategy: remaining heavily dependent on coal for its current energy needs while aggressively investing in clean energy technology. China dominates the global manufacturing of solar panels, batteries, and electric vehicles, and is positioning itself to lead the clean energy economy of the future. This technological competition between the U.S. and China is reshaping the global energy landscape and the geopolitics of climate action.
Health, Inequality, and Climate Justice
Climate change is not just an environmental problem — it is a human health and social justice crisis. The Lancet Countdown, a global research collaboration tracking the connections between climate and health, reported in 2025 that heat stress, air pollution, food insecurity, and the spread of infectious diseases linked to climate change are all worsening. Outdoor workers, elderly people, children, and those with pre-existing health conditions are especially vulnerable.
The impacts of climate change fall disproportionately on the world's poorest and most vulnerable populations — communities that have contributed the least to the emissions causing the problem. Small island nations in the Pacific and Indian Oceans face losing their entire homelands to rising seas. Sub-Saharan Africa faces increasing drought and food insecurity. South Asian cities endure extreme heat waves that make outdoor activity deadly. Climate justice — the idea that those who bear the greatest burden of climate change deserve the most support — has become a central principle in international negotiations.
Climate financing for developing nations remains deeply inadequate. Wealthy countries pledged to provide $100 billion per year in climate finance to developing nations — a commitment that took years to be technically met, and which many argue is still far short of what is actually needed for adaptation and resilience. As climate shocks stretch public budgets, countries are testing new financial tools such as debt relief tied to climate action, green bonds, and insurance mechanisms to fund adaptation.
What the Science Says We Must Do
The scientific consensus is unambiguous: to avoid the worst consequences of climate change, global greenhouse gas emissions must be cut roughly in half by 2030 and reach net zero by mid-century. This requires a fundamental transformation of our energy systems, transportation, industry, agriculture, and land use — all within the space of a single generation.
Renewable energy must continue to scale at record speed. Fossil fuel use must be phased out. Forests must be protected and restored. Agriculture must become more sustainable and less carbon-intensive. Carbon capture and storage technologies, which remove CO₂ directly from the atmosphere, need to be scaled responsibly — particularly for industrial sectors where emissions are hardest to eliminate. And crucially, the financial system must redirect trillions of dollars away from fossil fuel infrastructure and toward clean alternatives.
The good news is that the tools exist. Solar energy, wind power, electric vehicles, heat pumps, energy efficiency, and sustainable land management are all available today, and most have become cheaper than fossil-fuel alternatives. The barrier is no longer primarily technology or economics — it is political will, institutional inertia, and the entrenched power of fossil fuel interests.
Where We Stand in April 2026
As of April 2026, the world stands at a critical juncture. The science is clearer than ever, the impacts are undeniable, and the solutions are available. Clean energy is winning on economics. Public awareness of climate change has never been higher. And yet, global emissions have not yet peaked and the gap between current actions and what is needed to limit warming to 1.5°C remains enormous.
The Doomsday Clock's 2026 statement on climate noted that current national targets, if fully implemented, would allow global temperature to rise between 2.3 and 2.5°C. The probability that the world will breach the 1.5°C threshold — at least temporarily — within the next five years has risen to nearly 50%. Every fraction of a degree of warming prevented matters enormously: it means fewer people displaced, fewer species lost, less food insecurity, and fewer lives cut short by extreme heat and climate-driven disasters.
Climate change is the defining challenge of our time. It demands action from governments, corporations, and individuals alike. It requires cooperation across borders and across generations. And it asks each of us to understand the science, engage with the facts, and support the changes needed to protect the planet we share. Education — exactly the kind you are doing right now — is one of the most powerful tools we have.
Key Terms to Know
Greenhouse gases (GHGs): Gases like carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) that trap heat in Earth's atmosphere and drive global warming.
Paris Agreement: A 2015 international treaty signed by 196 countries to limit global warming to well below 2°C and preferably to 1.5°C above pre-industrial levels.
Net zero: A state in which the total amount of greenhouse gases emitted is balanced by the amount removed from the atmosphere.
Carbon budget: The maximum total amount of CO₂ that can be emitted while still keeping warming below a given threshold (like 1.5°C). This budget is nearly exhausted.
Tipping points: Critical thresholds in the climate system — such as the collapse of the Greenland ice sheet or the dieback of the Amazon rainforest — that, once crossed, could trigger rapid and irreversible changes.
Climate adaptation: Adjustments made by communities and societies to reduce the harm caused by climate impacts that are already happening or expected to happen.
Climate mitigation: Actions taken to reduce greenhouse gas emissions and prevent further warming — such as switching to renewable energy, improving energy efficiency, and protecting forests.
Sources: Yale Climate Connections, United Nations, Bulletin of the Atomic Scientists, Stockholm Environment Institute, World Resources Institute, Wikipedia — 2025 in Climate Change, Greenly Earth. All data current as of April 2026.