what is global warming?
Answers
Answer:
Climate change includes both the global warming driven by human emissions of greenhouse gases, and the resulting large-scale shifts in weather patterns.
Explanation:
Climate change includes both the global warming driven by human emissions of greenhouse gases, and the resulting large-scale shifts in weather patterns.[1] Though there have been previous periods of climatic change, since the mid-20th century the rate of human impact on Earth's climate system and the global scale of that impact have been unprecedented.
That human activity has caused climate change is not disputed by any scientific body of national or international standing.[3] The largest driver has been the emission of greenhouse gases, of which more than 90% are carbon dioxide (CO
2) and methane.[4] Fossil fuel burning for energy consumption is the main source of these emissions, with additional contributions from agriculture, deforestation, and industrial processes.[5] Temperature rise is accelerated or tempered by climate feedbacks, such as loss of sunlight-reflecting snow and ice cover, increased water vapour (a greenhouse gas itself), and
Because land surfaces heat faster than ocean surfaces, deserts are expanding and heat waves and wildfires are more common.[8] Surface temperature rise is greatest in the Arctic, where it has contributed to melting permafrost, and the retreat of glaciers and sea ice. Increasing atmospheric energy and rates of evaporation cause more intense storms and weather extremes, which damage infrastructure and agriculture.[9] Rising temperatures are limiting ocean productivity and harming fish stocks in most parts of the globe. Current and anticipated effects from undernutrition, heat stress and disease have led the World Health Organization to declare climate change the greatest threat to global health in the 21st century. Environmental effects include the extinction or relocation of many species as their ecosystems change, most immediately in coral reefs, mountains, and the Arctic. Even if efforts to minimize future warming are successful, some effects will continue for centuries, including rising sea levels, rising ocean temperatures, and ocean acidification from elevated levels of CO
2.
The Intergovernmental Panel on Climate Change (IPCC) assesses the scientific, technical and socioeconomic information relevant to understanding of human-induced climate change. The IPCC has assessed that there is much greater risk to human and natural systems if warming exceeds pre-industrial levels by 1.5 °C (2.7 °F).[11] Under the Paris Agreement, nations are making climate pledges to reduce greenhouse gas emissions. However, even if nations followed through on current promises, global warming would still reach about 2.8 °C (5.0 °F) by 2100.[12] To obtain about a 50% chance of preventing the most damaging effects of climate change by limiting warming to 1.5 °C (2.7 °F), methane emissions would need to decrease to near-zero levels and CO
2 emissions to net-zero levels by the year 2050.[13]
Mitigation efforts include the development and deployment of low-carbon energy technologies, enhanced energy efficiency, policies to reduce fossil fuel emissions, reforestation, and forest preservation. Climate engineering techniques, most prominently solar radiation management, have been proposed and are being researched as a potential supplement to reducing emissions.[14] Societies and governments are also working to adapt to current and future global-warming effects through improved coastline protection, better disaster management, and the development of more resistant crops.
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Answer:
Global warming is a big problem.in front of us . It is a situation in which the temperature of earth rise due to increase in carbon dioxide in the atmosphere. this led to the melting of glaciers which later submerged the islands in them.
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