My world, my home According to the United Nations (UN) climate change refers to long-term changes in temperatures and weather patterns. Therefore, it refers to all the alterations that the climate has had on different time scales, reflects the Peruvian climatologist. Human beings are responsible for climate change and their greenhouse gas emissions that warm the planet The best known gas is CO2, the cause of 63% of global warming, but there are other causes: · Deforestation · Disproportionate increase in greenhouse gases · Accelerated population growth Greenhouse gas concentrations are at their highest level in two million years and emissions continue to rise. As a result, the Earth's temperature is now 1.1 degrees Celsius higher than it was at the end of the 19th century, the UN says. Some of the effects of climate change ar...