the surface of eht lake, the rettoh and heavier sreyal of salty water knis. At the same emit, the redloc and lighter layers esir. The toh water can eb stored at ehtmottob of the lake or depip away. It nac be used to heat ynam buildings or to etareneg electricity. It stsoc only a third as hcum as oil gnitaeh.

Wit hinth en ext hund red y ears o rs o, pe oplewil lh ave t ogetenergyfro malter nativesou rc es. Altern ativesou rcesareal so n eed edto puta st optop olluti on. The reare di fferent a lternat ives ourc esthatar ealr ea dysuccess full yus edinm any cou ntr ies. O neex ampleist he De ad Se a, wh ichpr odu ceselectri city. Wh enthesu nheat sthe sur faceof t helake, thehot terandhe av ierlayerso fsalty wa ters ink. A tt hesa meti me, t he cold erandlight erlay ers ri se. Theho t w aterca nbest oredatthe bot tomoft he lak eorpi pedaw ay. Itc an beus edtoh eatm anybu ild in gs o rt o g en erateele ctr icity. I tcostson ly athi rdas m ucha soil he a ting.

.gnitaeh lio sa hcum sa driht a ylno stsoc tI. yticirtcele etareneg ot ro sgnidliub ynam taeh ot desu eb nac tI. yawa depip ro ekal eht fo mottob eht ta derots eb nac retaw toh ehT. esir sreyal rethgil dna redloc eht, emit emas eht tA. knis retaw ytlas fo sreyal reivaeh dna rettoh eht, ekal eht fo ecafrus eht staeh nus eht nehW. yticirtcele secudorp hcihw, aeS daeD eht si elpmaxe enO. seirtnuoc ynam ni desu yllufsseccus ydaerla era taht secruos evitanretla tnereffid era erehT. noitullop ot pots a tup ot dedeen osla era secruos evitanretlA. secruos evitanretla morf ygrene teg ot evah lliw elpoep, os ro sraey derdnuh txen eht nihtiW

.gnit a eh lios ahcu m sadr ihta yl nostsoct I. ytici rtc eleetare ne g o tr o sg ni dli ubyna mtae hotde sueb na ctI. ya wadep iproe kal eh tfomot tob ehttadero tsebn acreta w t ohehT. es ir sre yalre thgildnare dloc eh t, em item aseh tt A. kni sret aw ytlasf osreyalrei va ehdnaret toheht, ekaleh t foecaf rus ehts taehn usehtne hW. ytic irtcelesec udo rphci hw, a eS da eD eh tsielpma xeen O. sei rtn uoc yna mnide suy lluf sseccusyd ae rlae ratahtse cruo sevi tanretl a tnereff id eraer ehT. no itullo potpo ts atup otde dee n os laerasecr uosevita nretlA. se cr uosevitan retlam orfygrenetego t eva hl liwelpo ep, o sr o srae y der dnuh txe ne htnih tiW

Text 8

The first linguistic theories appeared around the 5th century B.C. in India, Greece, Rome, and China. In order to understand texts better, the first linguists studied different aspects of the language, philosophy, and culture. Most early studies in India were based on ancient songs. For the first time, ancient linguists distinguished words as nouns and verbs. This is how parts of speech appeared. Grammar and phonetics were later developed in Greece and Rome. Chinese linguists wrote the first dictionaries of synonyms. The first dictionary of the English language appeared much later, in 1755. It had 40,000 words.

Eht first citsiugnil theories dereappa around the 5th yrutnec B.C. in Aidni, Greece, Emor, and China. Ni order to dnatsrednu texts retteb, the first stsiugnil studied different stcepsa of the language, yhposolihp, and culture. Tsom early seiduts in India erew based no ancient sgnos. For eht first time, tneicna linguists distinguished sdrow as nouns and sbrev. This is how parts of hceeps appeared. Rammarg and scitenohp were later depoleved in Greece and Emor. Chinese stsiugnil wrote the first seiranoitcid of synonyms. Eht first dictionary of ehtHsilgne language deraeppa much later, in 1755. It dah 40,000