Every increase in global warming matters.In the future, the number of “climate refugees” is expected to rise. Conditions like sea-level rise and saltwater intrusion have advanced to the point where whole communities have had to relocate. Some of us are already more vulnerable to climate impacts, such as people living in small island developing States. It affects our health, ability to grow food, housing, safety and work. People are experiencing climate change in diverse ways.The consequences of climate change now include, among others, intense droughts, water scarcity, severe fires, rising sea levels, flooding, melting polar ice, catastrophic storms and declining biodiversity. Because the Earth is a system, where everything is connected, changes in one area can influence changes in all others. But temperature rise is only the beginning of the story. Many people think climate change mainly means warmer temperatures.The last decade was the warmest on record. As a result, the earth is about 1.1☌ warmer than it was in the 1800s. Greenhouse gas concentrations are at their highest levels in 2 million years and continue to rise.Energy, industry, agriculture and waste disposal are among the major emitters. Landfills for garbage are another source. Clearing land and forests can also release carbon dioxide. These come from burning fossil fuels such as gasoline for driving a car or coal for heating a building. Examples of greenhouse gas emissions that are causing climate change include carbon dioxide and methane.Increasing greenhouse gas emissions from human activity act like a blanket wrapped around the earth, trapping the sun’s heat and raising temperatures.But today we are experiencing unprecedented rapid warming from human activities, primarily due to burning fossil fuels that generate greenhouse gas emissions. In millions of years, our world has been warmer and colder than it is now. Climate change can be a natural process where temperature, rainfall, wind and other elements vary over decades or more.
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