Three natural resources which are overused nowdays are not easy to restore them
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Answer:
The world is heading for an "ecological credit crunch" far worse than the current financial crisis because humans are over-using the natural resources of the planet, an international study warns today.
The Living Planet report calculates that humans are using 30% more resources than the Earth can replenish each year, which is leading to deforestation, degraded soils, polluted air and water, and dramatic declines in numbers of fish and other species. As a result, we are running up an ecological debt of $4tr (£2.5tr) to $4.5tr every year - double the estimated losses made by the world's financial institutions as a result of the credit crisis - say the report's authors, led by the conservation group WWF, formerly the World Wildlife Fund. The figure is based on a UN report which calculated the economic value of services provided by ecosystems destroyed annually, such as diminished rainfall for crops or reduced flood protection.
The report continues: "We have only one planet. Its capacity to support a thriving diversity of species, humans included, is large but fundamentally limited. When human demand on this capacity exceeds what is available - when we surpass ecological limits - we erode the health of the Earth's living systems. Ultimately this loss threatens human well-being." Speaking yesterday in London, the report's authors also called for politicians to mount a huge international response in line with the multibillion-dollar rescue plan for the economy. "They now need to turn their collective action to a far more pressing concern and that's the survival of all life on planet Earth," said Chief Emeka Anyaoku, the president of WWF International.
Sir David King, the British government's former chief scientific adviser, said: "We all need to agree that there's a crisis of understanding, that we're removing the planet's biodiverse resources at a rate which is as fast if not faster than the world's last great extinction."
At the heart of the Living Planet report is an index of the health of the world's natural systems, produced by the Zoological Society of London and based on 5,000 populations of more than 1,600 species, and on an "ecological footprint" of human demands for goods and services.
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Answer:
Explanation:
1- petroleum
2-wood
3-coal
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