Climate changes Climate is the usual weather of a place. Climate can be different for different seasons. A place might be mostly warm and dry in the summer.

Presentación del tema: "Climate changes Climate is the usual weather of a place. Climate can be different for different seasons. A place might be mostly warm and dry in the summer."— Transcripción de la presentación:

1 Climate changes Climate is the usual weather of a place. Climate can be different for different seasons. A place might be mostly warm and dry in the summer. The same place may be cool and wet in the winter.

2 Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels, cutting down rainforests and farming livestock. This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming.

3 Global warming is the increase in the average temperature of the Earth's near- surface air and the oceanssince the mid-twentieth century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 100 years ending in 2005. The Intergovernmental Panel on Climate Change (IPCC) concludes that human-sourced greenhouse gases are responsible for most of the observed temperature increase since the middle of the twentieth century, and natural phenomena such as solar variation and volcanoes probably had a small warming effect from pre- industrial times to 1950 and a small cooling effect from 1950 onward. These basic conclusions have been endorsed by more than 40 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries.airoceansIntergovernmental Panel on Climate Changehuman-sourcedgreenhouse gasespre- industrial

4 A greenhouse gas (abbrev. GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. [1] The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.gasabsorbsemitsthermal infraredgreenhouse effect [1]Earth's atmospherewater vaporcarbon dioxidemethanenitrous oxideozone

5 greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.

6 Climate change is a change in the statistical distribution of weather patterns when that change lasts for an extended period of time (i.e., decades to millions of years). Climate change may refer to a change in average weather conditions, or in the time variation of weather within the context of longer-term average conditions. Climate change is caused by factors such as biotic processes, variations in solar radiation received by Earth, plate tectonics, and volcanic eruptions.weatherbioticsolar radiationplate tectonicsvolcanic eruptions

7 What can you do for changing the environment problems