can you tell me the subtopics of global warming
Answers
Answer:
*effects of global warming.
*reason of global warming.
*how to control global warming.
*the steps taken to control global warming.
Answer:
I THINK THAT IT HELP YOU
Glaciers are melting, sea levels are rising, cloud forests are dying, and wildlife is scrambling to keep pace. It has become clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than at any time in the last 800,000 years.
We often call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. While many people think of global warming and climate change as synonyms, scientists use “climate change” when describing the complex shifts now affecting our planet’s weather and climate systems—in part because some areas actually get cooler in the short term.
Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a range of other impacts. All of those changes are emerging as humans continue to add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that all living things have come to rely on.
What will we do—what can we do—to slow this human-caused warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the fate of the Earth as we know it—coasts, forests, farms, and snow-capped mountains—hangs in the balance.
PHOTOS OF GLOBAL WARMING IMPACTS
Picture of a melting iceberg
Picture of the everglades from above
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An iceberg melts in the waters off Antarctica. Climate change has accelerated the rate of ice loss across the continent.
PHOTOGRAPH BY PAUL NICKLEN, NAT GEO IMAGE COLLECTION
As sea levels rise, salty ocean waters encroach into Florida’s Everglades. Native plants and animals struggle to adapt to the changing conditions. COLLECTION
In the high plains of Bolivia, a man surveys the baked remains of what was the country’s second… Read More
PHOTOGRAPH BY MAURICIO LIMA, NAT GEO IMAGE COLLECTION
Climate change is impacting flora and fauna across the Arctic. Although scientists don't know… Read More
PHOTOGRAPH BY CRISTINA MITTERMEIER, NAT GEO IMAGE COLLECTION
Lake Urmia, in Iran, is a critical bird habitat and used to be a popular tourist destination. It is drying up because of climate change and management issues.
PHOTOGRAPH BY NEWSHA TAVAKOLIAN, NAT GEO IMAGE COLLECTION
The Scherer power plant in Juliet, Georgia, is the largest coal-fired power plant in the U.S. It burns… Read More
PHOTOGRAPH BY ROBB KENDRICK, NAT GEO IMAGE COLLECTION
Ice melts on a mountain lake. Lakes around the world are freezing less and less over time, and in a few… Read More
PHOTOGRAPH BY ORSOLYA HAARBERG, NAT GEO IMAGE COLLECTION
The Amazon is losing the equivalent of nearly one million soccer fields of forest cover each year, much… Read More
PHOTOGRAPH BY FRANS LANTING, NAT GEO IMAGE COLLECTION
In Glacier National Park, forests are feeling the effects of early snowmelt and long, dry summers. The stresses on the park's flora are exacterbated by climate change.
PHOTOGRAPH BY KEITH LADZINSKI, NAT GEO IMAGE COLLECTION
Understanding the greenhouse effect
The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat. These gases let in light but keep heat from escaping, like the glass walls of a greenhouse, hence the name.
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Sunlight shines onto the Earth's surface, where the energy is absorbed and then radiate back into the atmosphere as heat. In the atmosphere, greenhouse gas molecules trap some of the heat, and the rest escapes into space. The more greenhouse gases concentrate in the atmosphere, the more heat gets locked up in the molecules.
Scientists have known about the greenhouse effect since 1824, when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere. This natural greenhouse effect is what keeps the Earth's climate livable. Without it, the Earth's surface would be an average of about 60 degrees Fahrenheit (33 degrees Celsius) cooler.
A polar bear stands sentinel on Rudolf Island in Russia’s Franz Josef Land archipelago, where the perennial ice is melting.
PHOTOGRAPH BY CORY RICHARDS
In 1895, the Swedish chemist Svante Arrhenius discovered that humans could enhance the greenhouse effect by making carbon dioxide, a greenhouse gas. He kicked off 100 years of climate research that has given us a sophisticated understanding of global warming.