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Like all living organisms, humans need resources to live.
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We need food, clean water and a shelter to live in.
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A few thousand years ago this is all we would have wanted.
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A full stomach and a warm dry home.
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But as the human race has developed, we now have a need for other, more luxurious items.
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Maybe a bicycle, or a car to get us from A to B, electricity, even the Internet.
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All these things require resources.
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Lots and lots of resources, such as fossil fuels and metals.
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Many of these resources are limited.
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Once all the fossil fuels have been extracted from the earth and burned to provide us with fuels and electricity, there will be none left.
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How will future generations of humans cope without the things we take for granted?
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And that's before we even consider the effect the burning of fossil fuels is having on our planet and the climate.
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Future generations will also have to deal with the effects of that too.
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This is where sustainable development comes in.
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One way is to use renewable ressources - such as solar energy, wind and biogas - to generate electricity, rather than fossil fuels.
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Another example is using quick-growing trees like pine as a source of wood.
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These trees can be cut down and replanted, providing an ever-ready supply.
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This is more sustainable than using slow growing trees like oak which take hundreds of years to reach maturity.
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Another more sustainable life choice is recycling.
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Recycling plastics, metals and paper means that fewer resources need to be extracted from the earth,
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as we can reuse their already extracted products, meaning more resources for future generations.
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As the human population grows, so does the demand for food.
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There is limited farmland, soil fertility, water and fish stocks so we should also be using the sustainable ways of growing, catching and farming food.
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We remove more than 77 billion kilograms of fish from the ocean each year.
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Unsurprisingly, the number of some species of fish in the world are declining because of overfishing.
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We are taking fish from the sea faster than populations can reproduce, and might go extinct if the populations continue to fall.
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There are several initiatives that have been introduced to help conserve fish populations and allow us to enjoy eating fish now and in the future.
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Fishing quotas are strict numbers of fish that limit the amount of fish and people can catch.
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This reduces the amount of fish being taken from the sea.
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The holes on fishing nets have to be large enough to let the smaller, younger fish escape.
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This then gives them the chance to reproduce and help maintain the population.
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Another solution is fish farms.
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Eating farmed fish reduces the number of fish being caught from the wild.
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It is important to realise that these initiatives have an impact on the people who rely on fishing for their income.
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Fishing quotas have helped to increase fish populations,
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but there has to be a balance between sustainable development for future generations and making sure that people today are also provided for.
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In other videos we will look at food security and biodiversity in more detail.
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So in this video we have covered what sustainable development is and some examples, including how to solve the problem of overfishing.
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If you liked the video give it a thumbs up and don't forget to subscribe!
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Comment below if you have any questions.
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Until next time!