- Climate change can be defined as a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use. The United Nations Framework Convention on Climate Change (UNFCCC), in its Article 1, defines climate change as: ‘a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods’.
- Greenhouse gas emissions act like a blanket wrapped around the Earth trapping the Sun’s heat and raising temperatures. Human activities are causing greenhouse gases that are warming the world faster than at any time in at least the last two thousand years. The average temperature of the Earth’s surface is now about 1.1°C warmer than it was in the late 1800s (before the industrial revolution) and warmer than at any time in the last 100,000 years. The last decade (2011-2020) was the warmest on record, and each of the last four decades has been warmer than any previous decade since 1850. Clearing land and cutting down forests can also contribute to climate change. Agriculture, oil and gas operations are major sources of emissions. Energy, industry, transport, buildings, agriculture, poor waste management and land use are among the main sectorscausing greenhouse gases.
- https://www.britannica.com/science/carbon-cycle
.png)
.png)
.jpg)
