Global warming is caused by human activities like burning fossil fuels and deforestation. This increases carbon dioxide levels in the atmosphere, trapping heat in a greenhouse effect. As a result, evaporation and rainfall decrease while temperatures rise, turning more land into deserts. To address global warming, individuals need to reduce their energy usage by actions like turning off lights and taking shorter showers, while governments must cut greenhouse gas emissions and halt deforestation. Deserts are experiencing threats from climate change that could cause plant and animal species to become extinct.

1. Biomes and Global Warming Deserts

2. Global Warming Global warming refers to the Earth's temperature rise, mainly, caused by some human actions, such as: - Burning gasoline to drive cars and trucks; - Burning oil, coal or wood to produce electricity for heating, cooling, and other purposes; - Burning forests to clear land. Deforestation is an another important fact too, that contributes to this problem, because of the reduction of the evaporation levels; decrease of rainfall tax; dry and sterility of the ground.

3. E vaporation levels Precipitation levels Hotter and dry climate Clouds amount that reflects the heat of the sun Ground harder doesn`t absorb H2O of rain Deforestation Temperature of terrestrial surface Moistness Fertility For intensive agriculture Extinguishing of species and Desertification infertility of the ground

4. Greenhouse effect Deforestation, fires and burning of fossil fuels will incresase the carbon dioxide level in the atmosphere creating "a specie of roof", as of a greenhouse, on the Earth leaving the light of the sun enter and not allowing the heat escape to the space. CO2 release Burning of fossil fuels Fires Increase of the Greenhouse CO2 levels effect Destuction of trees The photosyntheses does not occur

5. What should we do about global warming? Many people, animals and plants can't take the change due to: High temperature; Rise of the sea level; Excessive abuse of energy . To make some difference, in order to help and solve this global problem we should: - Turn off the lights, when you aren't using it; - Take short showers; - Recycle; - Dress warmly inside your house, when it's cold instead of turning up the heat; - Plant a tree; - (....)

6. Deserts/our biome: This biome is located near the tropic of cancer or the tropic of capricorn.The average yearly rainfall of my biome is lesser than 25 centimeters a year.The average temperature in hot and dry deserts, is from 20 degrees to 25 degrees.The extreme maximun temperature is from 43,5 degrees to 49 degrees. In cold deserts, near the arctic part of the world, the temperature in winter is from 2 degrees to 4 degrees and in summer is from 21 degrees to 26 degrees a year. Interesting facts or unique features: Deserts cover about 1 fifth of the Earth land surface.

7. Some animals and plants commons in deserts Animals: Ant Dromedary Kangaroo Pika Ostrich Eagle Antelope Arabian camel Bilby Dragonfly Armadillo Lizard(Fig.1) Flamingo Javelina (...) Plants: Barrel Cactus(Fig.2) Joshua Tree Jumping Cholla Ocotillo Palo Verde Soaptree Yucca Saguaro Cactus Brittle Bush Creosote Bush Mojave Aster Desert Ironwood Chainfruit Cholla Crimson Hedgehog Cactus (...) Fig.1 Fig.2

8. Conclusion The deserts of the world are facing threats without precedents, mainly because of the climatic changes, consequently, some species of vegetables and animals will die. To prevent the effect of the global warming it is necessary that the developed countries decrease the emissions of greenhouse gases drastically, and equally reduce the deforestantion and the forest fires, stimulating the recycling.