cutting down and clearing trees from the area. What does it mean if a plant or animal becomes extinct? There are no more of that type of plant or animal alive in the world. Which is a factor in the destruction of the African rainforest? annual grass fires.
What is the biggest threat to the African rainforests today?
Which is the biggest threat to African rainforests today? Overpopulation and deforestation.
What is one of the major problems facing those who depend on rivers for their main source of water?
What is one of the major problems facing those who depend on the Nile River for their water? The water is contaminated with human and industrial waste. How did the Aswan High Dam change Egyptian farming?
What destroyed the grassland and forests that were once found in the Sahel *?
What destroyed the grassland and forests that were once found in the Sahel? Years of heavy flooding.
In what area are desertification problems the greatest?
(February 2001) Desertification is most severe in Africa. Arid lands account for two-thirds of the African continent, and three-quarters of the continent’s drylands that are used for agriculture have already begun to lose productivity.
What are the 3 greatest threats to the rainforest?
What are the Threats to the Rainforests?
- The growth of populations in countries with rainforest.
- An increase in worldwide demand for tropical hardwoods has put a greater strain on the rainforests.
- Cattle Grazing in South America.
- Soya plantations in South America.
- Palm oil plantations in Indonesia.
Which African country is losing its rainforest the fastest?
Ghana is losing its rainforest faster than any other country in the world. May 1, 2019 This article is more than 2 years old. Ghana’s rainforest is being lost at an alarming rate, according to a new report about the state of forests worldwide.
Which is Earth’s largest source of drinkable water?
The oceans are, by far, the largest reservoir of water on earth — over 96% of all of Earth’s water exists in the oceans. Not only do the oceans provide evaporated water to the water cycle, they also allow water to move all around the globe as ocean currents.
What is the main source of fresh water?
The original source of almost all fresh water is precipitation from the atmosphere, in the form of mist, rain and snow. Fresh water falling as mist, rain or snow contains materials dissolved from the atmosphere and material from the sea and land over which the rain bearing clouds have traveled.
What is the greatest risk to Earth’s water supply?
The greatest risk to the earth’s water supply is water pollution and over use of water due to human interventions. Only a small amount of water is available for human consumption,rest is saline in taste, which makes it unsuitable for human consumption.
Why is most rainforest area lost today?
The ever-growing human consumption and population is the biggest cause of forest destruction due to the vast amounts of resources, products, services we take from it. Half the world’s rainforests have been destroyed in a century, at this rate you could see them vanish altogether in your lifetime!
Why is farming so difficult in the African Sahel?
The Sahel is a semi-arid transition zone in the agro-climatic zone south of the Sahara Desert and north of the wetter North Sudanian region. … Rainfall—or more specifically, the absence of significant rainfall—is a significant challenge for farmers in the Sahel. Droughts periodically cause severely reduced crop yields.
Is the savanna in danger?
Around the world, savannas are threatened by human actions like logging, development, conversion to agriculture, over-grazing by livestock, and introduction of non-native plant species.
What are 3 causes of desertification?
Overgrazing is the major cause of desertification worldwide. Other factors that cause desertification include urbanization, climate change, overuse of groundwater, deforestation, natural disasters, and tillage practices in agriculture that make soils more vulnerable to wind.
How can desertification be prevented?
Preventive actions include:
- Integrating land and water management to protect soils from erosion, salinization, and other forms of degradation.
- Protecting the vegetative cover, which can be a major instrument for soil conservation against wind and water erosion.
What is the main cause of desertification?
‘Climatic variations’ and ‘Human activities’ can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.