Conserving Natural Resources

Conserving Natural Resources



hey guys mr. Klein here's our second of two lessons on science and the environment and our last lesson we talked about the types of resources renewable and nonrenewable specifically how it talks about energy creation and in this lesson we're gonna talk about how we take care of resources how we can conserve them so let's go ahead and let's get started fish a that that's one way the fish I mean just hold out your arm and you can catch them who needs a fishing pole ah but fish and fishing and Fisheries and things like that are really really important topic of conversation with regards to conservation because it's a renewable resource but the thing is if we catch all the fish and don't let them replenish we'll run out of fish and things with that forests and things of that nature are really really important and we're gonna look at this lesson what we can do in order to be responsible citizens and do our part to help keep the environment safe so let's go ahead and let's get started alright you might wonder why people call for new Abul resources to be conserved and managed I mean you might think if they can be renewed then they can last forever like I said with these for the fish in the last screen it's not true living organisms it's important to have the amount of the resource taken be less than the rate of growth to ensure there can always be a supply okay so that's really really important we need to take less than is being replenished that way the supply can stay around the practice of ensuring that there always can be a supply of a natural resources actually what we call sustainability okay and that's a really big push is that these resources can't let can last forever but if we're not careful they won't so we're gonna look at some ways that we can use some sustainability with our natural resources okay so let's go ahead and let's create our graphic organizer conserving natural resources this is where we're gonna be talking about with this lesson so first off we're gonna talk about forests okay now we use wood in our everyday lives all the time after all the paper do you do your school work is made of trees this is the wood and your pencil and the writing surface on your desk okay and the walls in your house most likely okay so on and so forth where does this all come we'll Forrest okay then you don't go to the tree store and pick up you know wood pulp in order to make paper we get it from forest okay in order for forest know they'll be providing for our needs for the future Horace have to be logged and have to be managed correctly and there's two methods for conserving forests that we're gonna look at it's the way the trees are cut down okay so what we're gonna do is we're gonna start forest I hate this is our first way we're going to look at our conserving natural resources okay so clear cutting is the first way clear cutting involves cutting all the trees hence the term clear of areas of a forest use now this is the first way this is the most common way of taking care of trees and forests what happens they take out a section just cut all the trees down everything no matter to size and they use them for you know for paper and pencils and furniture and things like that now the benefit to clear cutting is actually pretty easy oh it makes logging a whole lot easier too because you just go in and you clear out and then what you can do is you can farm the trees so you can plant trees and right behind you and then they can grow back up and you clear it out again the sound side to the strategy is that while waiting for new trees to grow the soul is vulnerable to what we call erosion which is the carrying away of soil by water and wind and also if you're not careful and you don't replant clear-cutting can cause a whole lot of erosion the process we call deforestation so this is what clear-cutting looks like okay you they just go in and cut off all the trees and then they replant trees behind them and then they grow up from there and this is what clear-cutting looks like uh this is an this is an Indonesia if I'm not mistaken and this is clear cutting but the problem is they're not going back and planting trees and as a result you have erosion and degradation in the environment which isn't very good okay the other type is kind of the opposite of clear cutting and it's selectively cutting it involves the cutting now of only certain trees that meet the requirements of the company harvesting the trees and you leave the rest alone so the tree company the the forestry company might say oh well we need trees to be you know so and so centimetres in diameter all of those go so the logging machines go in is they cut only those trees and they leave the rest of them alone now the benefit is that erosion is prevented because you're still leaving trees over and also the local habitat remains after the cutting okay so in other words all the little rabbits and beer and everything else and the ecosystem stays there with selective cutting but there are downsides of it cutting certain trees means more acres of the forest have to be used to cut down trees because you're not going in and clearing out like clear cutting and if you want to cut down a hundred cheese and clear-cutting you just cut down 100 trees selective cutting means you have to go find the 100 trees that meet your requirements then cut them now which means more forestry machines and stuff like that in the forest also the machines have a hard time maneuvering around smaller trees which you can also damage them and so this is selective cutting right here as you can see you only pick out some of the trees in order to cut this is what selective cutting actually looks like um you can see only certain trees were cut down the rest were left over and so this is contrasting clear cutting and selective cutting with the images I have okay so the regrowth ease you can see clear cutting cuts up everything regrowth grows up after it okay selective cutting you cut down only certain ones and then the rest of them grow up to meet those requirements and they get cut later so let's go ahead and let's add our graphic organizer clear cutting and selective cutting to the types of forest and let's talk about Fisheries okay in fisheries are essentially talking about the harvesting of fish fish are a very important natural resource that can be harvested did you know that over half of the protein consumed by people worldwide actually comes from fish especially in Asia and in parts of Europe fish is a very important part of their diet here in south Louisiana it's important part of our diet because lots of people love go fishing and also we talk about seafood that becomes really important too because of the shrimping and oyster industries and even crawfish for things like that okay now it's important the concern fish population since so many people rely on it in their diet until recently overfishing reduced fish populations in popular areas by over 70% okay we kept on fishing in the same areas and catching the same fish and all of a sudden the populations bottom now in order to help fish populations rebound fishing limits have been introduced and the deliberate farming of fish species through aquaculture is allowing for fisheries to rebound so in other words you could only catch now you can only catch so much tuna or something like that catfish around here are caught through this and either fishing limits and limits for things also involves hunting and stuff for those of you like hunting waterfowl deer other sorts of game okay oh we use that in order to manage those populations also okay and fishing can actually be really dangerous and this is from Deadliest Catch out in the North Pacific with them catching snow crab and stuff like that they can only go out and fish for crab and catch crab for only certain times of the year because they want to keep the population safe okay so ways we can conserve fisheries are through fishing limits and aquaculture okay so it's just like trees you know and forestry you can manage the populations that way ok so how can you conserve non-renewable resources well because you can't replenish non-renewable resources conserving them involves processes in which these resources are you then conserved or recovered the easiest way to conserve natural resources is just to use less of them and don't be so wasteful ok so here are some ways you and your family can conserve natural resources ok first off you can turn off the lights in a room as you leave in fact I'm recording this in a room that's dark because I don't really need the light because the computer is giving me enough light and I don't need to light in order to talk as many of you know you might want to use more energy-efficient light bulbs like fluorescent or even LED bulbs which we'll look at in a second now I want to increase the insulation in your home especially in the roof to reduce the need for air conditioning in the summer because it keeps hot air out our heating in the wintertime which keeps and heat from escaping blowing on more than one errand at a time with your parents in order to say gasoline so in order you get in the car you got to go to run to the grocery store and then you go home and I go we forgot to rent videos at red box and we got to go back and get it okay you wrap it all up into a single trip in order to save the amount of gasoline and also it's better for gas mileage because the more short trips you take your car is less efficient and finally it's not possible at the school where I teach at because it's a very rural school riding a bike or public transportation if you live in a city it's a wonderful way because the carbon dioxide and fuel used by a bus can get split up between the number of people on the bus instead of a single person in a car so this is a comparison of light bulbs okay you can't really buy these incandescent light bulbs anymore they don't burn for a long time only about 750 hours you know you usually go through them this compact fluorescent light bulbs are a little more expensive but they last a whole lot longer look ten thousand hours over ten times the time okay say minute and they use these five times less energy but they're just as bright okay and plus they use a lot less electricity because what an incandescent bulb actually is is actually a piece of metal burning okay and also puts off a lot more heat but what's coming online in the past couple of years even more is LED or light-emitting diodes okay that's like the lights that you see at you know stoplights and stuff they say even more electricity use even less they're just as bright and then they have they have five times as much lifetime as a chlorophyll as a compact fluorescent bulb okay and Plus us CFLs or compact fluorescent bulbs will contain mercury which if they break and stuff which I've had happen to me in my house require a special process in order for them to be picked up and you can't just throw them in the trash you got it like drop them off in certain places so there's something to keep in mind so here are some simple concentration tips only use what's needed use energy-efficient bulbs increase the insulation your home if you can and reduce your car usage so finally let's talk about recycling that's the major way we can take care of conserving natural resources is through recycling or the reclaiming of natural resources for reuse now we do recycle paper and I know that we paper comes from one that's a renewable natural resource but I wanted to mention it right here okay paper is recycling order use reduced to use of newly cut trees okay so what happens is the more we recycle the less trees we have to cut down but there are three major non-durable Newville resources they're often recycled okay and there's things even like oil and and uses a motor oil and stuff like that that can be recycled stuff so this is these aren't the only things that we recycled first off metals they're recycled for industrial and consumer applications the metals are melted and then they're rolled in the sheets for use again plastics which are sturdy materials made from petroleum which we know from our last lesson what happens to them is you take your plastic bottles that get chopped and melted in recycling plants there didn't pour it into pellets and remould it into new products and we're going to look at all this in the next section finally glass which is made of silicon or sand can also be melted and cast in new products at the recycling plant for reuse so if you're like me you have a recycling bin for your stuff where they put everything into a single bin okay I've actually found in the last couple years that I've actually used recycling is the amount of trash that actually goes into my trashcan as opposed to my recycling bin is amazing whereas I recycle about 90% of the stuff I use and only 10% actually gets thrown away so what happens after you put it in the bin and the recycling truck picks it up well the truck unloads everything you have people sort through it and throw out stuff that shouldn't be recycled okay then it runs through a machine which removes the cardboard which is then taken off for a paper recycling plant then it takes out the paper okay and then people go through it again and they drop it off okay where metal and plastics go in and then what happens is the magnet can remove the steel cans which then go off the recycling and so what you're left are the plastics and the glass and the aluminum okay you an electrical current to kind of move the aluminum out of the way which then gets sent off to an aluminum plat or it gets melted and recycled glass bottles are screened out okay they're broken by steel discs and then they're there pieces go off to another plant which then they get melted down and then which you have left our plastics and plastics are made by different types and so they're separated out the different parts where they get to go and they get shredded and they get melted down so we're able at recycling plants to take all the recyclable material dump them in one pile and then sort them out other cities and other places like having the glass paper and aluminum and all that stuff in two separate things because they go to different plants so let's go ahead and let's wrap up our graphic organizer where you can recycle metals plastics glass and conserving natural resources we can recycle paper okay so we conserve natural resources we like doing that because we want to keep everything sustainable okay we can conserve forests through clear cutting and selective cutting and even recycling paper fisheries and other animals can be can be made or sustainable through fishing limits or some aquaculture the farming of them simple things you can do is you can only use the resources that are needed use energy-efficient bulbs in your house increase the insulation reduce car usage things like that and make sure your recycle recycle metals plastics glass and paper so there you go that's our lesson and that's it for the chapter hope you enjoyed it if as always you have any questions please let me know and thanks for watching

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