Global Warming

Global warming is the continuing rise in the average temperature of Earth's atmosphere and oceans. Global warming is caused by increased concentrations of greenhouse gases in the atmosphere, resulting from human activities such as deforestation and burning of fossil fuels. This finding is recognized by the national science academies of all the major industrialized countries and is not disputed by any scientific body of national or international standing.
Extreme weather events including heatwaves, droughts and heavy rainfall events,species extinctions. Warming and related changes will vary from region to region around the globe, though the nature of these regional changes is uncertain. Hence, the ecosystem services upon which human livelihoods depend would not be preserved.
The greenhouse effect is the process by which absorption and emission of infrared radiation by gases in the atmosphere warm a planet's lower atmosphere and surface. Human activity since the Industrial Revolution has increased the amount of greenhouse gases in the atmosphere. It is expected that most ecosystems will be affected by higher atmospheric CO2 levels, combined with higher global temperatures. Overall, it is expected that climate change will result in the extinction of many species and reduced diversity of ecosystems.