The Sahara Desert spans approximately 9.2 million square kilometers and is in fact the largest hot desert in the world. Located in North Africa, it covers parts of eleven countries, including Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan, Algeria, and Tunisia. This expanse of arid land is characterized by its often harsh climate, with massive temperature swings that can soar above 50 degrees Celsius during the day and plummet below freezing at night.
The Sahara is built up of a diverse amount of geographic landscapes, comprising mainly of sand dunes, gravel plains, rocky plateaus, and even some mountain ranges, such as the Ahaggar (with peaks rising above 9,500 feet) and Tibesti ranges (containing Mount Emi Koussi, a peak that rises a lofty 11,204 feet). Its iconic sand dunes, particularly in Algeria and Libya, can reach heights of up to 180 meters!
Human settlement in the Sahara Desert is limited but historically significant. Nomadic tribes, such as the Tuareg and Berbers, have traveled this desert for centuries, passing through it mainly for trade while other groups of people wouldn't dare try (understandably). There are some oases, providing vital water sources, that serve as hubs for small to medium-sized towns and cities, like Ghardaia in Algeria and Timbuktu in Mali, the latter being a UNESCO World Heritage site.
The short answer is yes. But, how do we know this? A number of studies, including one that spanned 93 years by researchers at the University of Maryland, have concluded that the sands of the Sahara have been expanding for some time, primarily southward into the Sahel region. Having grown an estimated 10% since 1920, this is an undeniable fact that continues to be demonstrated year after year, with expansion often at its fastest during the summer months when the already dry desert becomes even more absent of water.
The growth of the Sahara Desert is mainly driven by natural climate variability and human-induced climate change. Naturally, a process called the Atlantic Multidecadal Oscillation (AMO), a periodic climate cycle in the North Atlantic Ocean, significantly influences this expansion by affecting regional rainfall patterns. In the case of the Sahara, during warm phases of the AMO, this region experiences drier conditions, causing the desert landscape to spread.
The Sahara Desert's expansion is causing significant environmental and socio-economic issues. As mentioned, the southward creep of the desert into the Sahel is exacerbating drought conditions, making it difficult for local populations to maintain their agricultural and pastoral livelihoods. The loss of this farmland leads to food insecurity, pushing communities into poverty and increasing competition for resources. This can, and sometimes has, resulted in conflict and displacement as people migrate in search of more habitable areas.
As mentioned before, the Sahara's growth results from the complex interplay between natural cycles and climate change. Tackling this issue requires understanding these drivers and implementing strategies to mitigate their impacts on vulnerable regions. Reducing greenhouse gas emissions and adopting sustainable land management practices are some of the steps we can also take part in to help address the root causes of desertification.
Palm oil is an extremely versatile oil that has many different properties and functions that makes it so useful and so widely used. It is semi-solid at room temperature so can keep spreads spreadable; it is resistant to oxidation so can give products a longer shelf-life; it’s stable at high temperatures so helps to give fried products a crispy and crunchy texture; and it’s also odourless and colourless so doesn’t alter the look or smell of food products. In Asian and African countries, palm oil is used widely as a cooking oil, just like we might use sunflower or olive oil here in the UK.
As well as being versatile, compared to other vegetable oils the oil palm is a very efficient crop, able to produce high quantities of oil over small areas of land, almost all year round. This makes it an attractive crop for growers and smallholders, who can rely on the steady income that palm oil provides.
International Orangutan Day highlights the direct effects of our actions on the gentle giants of the treetops. Their actual populations have dwindled over the past 60 years, with over half being lost largely due to the encroachment of the palm oil industry in their native habitats like Borneo and Sumatra.
Worrying still, we have to consider that their numbers might be lower than what we know, with the rapid clearing of forests for palm oil plantations. This day serves as a call to action - to individuals, communities, and policymakers - to seriously address the dire situation these forest dwellers face in their homes.
By observing this day, we're reminded of the interplay of different life forms on our planet and why biodiversity matters for the health of our Earth.
Fun Facts about Orangutans
Orangutans are the world's largest arboreal mammals. They spend 90% of their time in trees, using their long arms to swing from branch to branch.
These red apes can use tools in the wild, such as sticks, to extract honey or insects from trees and learn sign language.
Female orangutans have the longest interbirth interval of any land mammal. Female orangutans give birth to one baby at a time and wait up to eight years between pregnancies.
After meat, fish is our primary source of proteins. However, is fish sustainable food? Sustainable seafood refers to seafood caught in the wild or farmed without causing a decline in marine life species. Fishes are abundant in the ocean, but the growing demand reduces their population.
The United Nations Food and Agricultural Organization estimates we overfish 85% of marine fish stocks. We move fish from their habitats before they can reproduce, reducing their population in the ecosystem. Other factors also make it difficult for fish to survive overfishing.
Things like rising sea temperatures, ocean acidification, plastic, and chemical pollution affect fish populations, making it difficult for them to survive overfishing. Overfishing disrupts the marine food web, as fish are a source of nutrients for other marine animals.
These animals would enter a state of decline because they don't feed properly. Also, the method used to fish can cause environmental damage. For instance, bottom trawling is a fishing technique that involves dragging a big net across the seabed. This method catches everything in its path.
It puts endangered animal species, i.e., sea turtles, at risk. Furthermore, the net disturbs the seabed- releasing carbon stored in the sediments. It also reduces the capacity of these areas to absorb carbon in the future.
Despite existing protective laws, hunters often target zebras for their skins and meat. Climate change further exacerbates the challenges for zebras, who struggle with drought and extreme heat waves, jeopardizing their food and water sources.
Moreover, urbanization, agriculture, and deforestation affect zebra habitats, increasing conflicts between humans and zebras.
International Zebra Day aims to raise awareness about what these creatures face, and by doing so, it calls everyone to action. Learn more about facts, the latest data, and global initiatives that can help you with the cause below.
Among animals there are different categories of animals; Some animals are harmless in nature and some animals are violent in nature. Naturally, apart from these two categories, there are several other categories of animals. Whose characteristics can be divided into different areas. There are many types of animals including monkeys, chimpanzees, gorillas, elephants, horses and more. Domestic animals and wild animals have many common characteristics. But uncommon features are more than common features. But the most important thing is that domestic animals do not easily attack humans. But wild animals make sudden attacks.
