Here is a map showing the general location of Australia’s tropical and temperate forests.

Australia’s forests face many threats including habitat modification, impact of exotic species, altered fire regimes, ecologically unsustainable resource use, and climate change.

The five largest deserts in Australia include the Great Victoria Desert: 424,400 km², Great Sandy Desert: 284,993 km², Tanami Desert: 184,500 km², Simpson Desert: 176,500 km², and the Gibson Desert: 156,000 km².

The map above shows the general location of the five major deserts. A recent trend has been an increase in rainfall in these arid areas. For example some parts of the Gibson desert have doubled in rainfall from an average of 150 mm to 300 mm annually.

Along with this increase in rainfall in the desert regions, there has been a decrease in southern areas. Scientists say that this is the result of north-west cloud bands that used to bring rain to sourthern regions, moving north over central Australia.

http://www.worldatlas.com/webimage/countrys/oceania/aussnewld.htm

http://www.outback-australia-travel-secrets.com/australian-desert.html

Here is a map of Antarctica I designed showing the land and ice shelves.

Antarctica is the fifth-largest continent in the world and is about 14.4 million square kilometers in size. 98 percent of the continent is covered by ice.

Ice shelves are formed around the continent where ice, which was formed on the land, moved off the land and is floating on the sea.

The ice on and around Antarctica has been speculated to be unaffected by climate change or global warming. There has been no evidence to suggest that melting Antarctic ice has contributed to a rise in sea level.

Another environmental characteristic is a large hole in the ozone layer above Antarctica. It is still increasing in size but it has no effect on the continent’s environment.

http://en.wikipedia.org/wiki/Antarctica#Effects_of_global_warming

Here is a map of the Sahara desert that I designed.

The Sahara desert is estimated to be about 9,000,000 square kilometers. It is bigger than the total area of Australia and almost as large as continental United States.

It encompasses Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia.

There has been speculation that the Sahara is expanding and encroaching on the Sub-Saharan region however these claims have not been proven.

Vegetation measurements taken from satellite images showed that over 11 years the Sahara ebbs and flows much like a tide and hasn’t been continually expanding.

Source:

http://findarticles.com/p/articles/mi_m1200/is_n3_v140/ai_11127602

In 1945, 61 percent of Thailand was covered by forest. This percentage dropped to 34 percent and currently about 28.4 percent of Thailand is covered by forest.

From 1990 to 2000 the rate of deforestation has been estimated at about 0.72 percent. From 2000 to 2005 deforestation had reduced to about 0.4 percent per annum.

The main driver of deforestation in Thailand is the rapid increase in population. This increase is most evident in the north eastern region where the forest is cleared for farming to feed the nation’s growing population.

The Government of Thailand has encouraged reforestation programs and had put in place a ban on all commercial logging in 1989.

Source:

http://rainforests.mongabay.com/deforestation/2000/Thailand.htm

http://en.wikipedia.org/wiki/Deforestation_in_Thailand