Ghana , first of the great medieval trading empires of western Africa fl. Ghana was populated by Soninke clans of Mande -speaking people who acted as intermediaries between the Arab and Amazigh Berber salt traders to the north and the producers of gold and ivory to the south. The empire should not be confused with the modern Republic of Ghana. An unconfirmed tradition dates the origins of the kingdom to the 4th century ce. Nothing is known of the political history of Ghana under its early kings. The first written references to the empire are those of Arabic geographers and historians from the 8th century, and it seems certain that, by , Ghana had become rich and powerful.
Desertification In The Sahel Essay
Study on Economics of Desertification, Land Degradation and Drought (DLDD) in India | TERI
Several studies report a substantial decline in insect populations. Most commonly, the declines involve reductions in abundance, though in some cases entire species are going extinct. The declines are far from uniform. In some localities, there have been reports of increases in overall insect population, and some types of insects appear to be increasing in abundance across the world. Some of the insects most affected include bees , butterflies , moths , beetles , dragonflies and damselflies.
Literature on container gardening (UC ANR)
See how your sentence looks with different synonyms. A ProPublica-Texas Tribune investigation found that the Rio Grande Valley project suffered from major erosion just months after it was finished. A ProPublica-Tribune investigation found that the Rio Grande Valley project suffered from major erosion just months after it was finished. The research team examined 10, individual valleys found in 66 valley networks on Mars, using custom-built algorithms to group them and infer what kind of erosion processes formed them. Additionally, over the last 20 million years, the building of the Himalayas, Andes, Alps and other mountains has more than doubled erosion rates, boosting weathering.
Climate fiction sometimes shortened as cli-fi is literature that deals with climate change and global warming. The genre frequently includes science fiction and dystopian or utopian themes , imagining the potential futures based on how humanity responds to the challenges created by climate change. Technologies such as climate engineering or climate adaptation practices often feature prominently in works exploring their impacts on society. Climate fiction is distinct from petrofiction which deals directly with the petroleum culture and economy. University courses on literature and environmental issues may include climate change fiction in their syllabi.