Scie ntis ts h avel on gbeenwor king o nn eworb italte chno logi es forgro wing p lan t s. Th yet ried t o growdif ferentplant son theInt ernatio nal Sp ace St at ion. Thenth e p lantswere sent b ack tothe Ear th forfurt herst udy. Thi syear, fort he f irstt ime, astro na ut scoul deat g re enleavesg ro wnin sp ace. Spacef armingi s ext remelyim portantfo rthefu turespa cemissio nsplan nedtoMa rs becau se itgiv esf reshf oo dand vitam in s. Then ewpl ant g row in gs ystemi sverys mart. Iti nformshuma ns wh enth eplants needwa ter. Specials ensors me a sure t hethic kness o fthel eaves. Ifthe ybe comet oo thi n, de tectorss ends ig nals. Th istech no logyhe lpssav e w aterin spa ceandgr owag oo dharv est.
.tsevrah doog a worg dna ecaps ni retaw evas spleh ygolonhcet sihT. slangis dnes srotceted, niht oot emoceb yeht fI. sevael eht fo ssenkciht eht erusaem srosnes laicepS. retaw deen stnalp eht nehw snamuh smrofni tI. trams yrev si metsys gniworg tnalp wen ehT. snimativ dna doof hserf sevig ti esuaceb sraM ot dennalp snoissim ecaps erutuf eht rof tnatropmi ylemertxe si gnimraf ecapS. ecaps ni nworg sevael neerg tae dluoc stuanortsa, emit tsrif eht rof, raey sihT. yduts rehtruf rof htraE eht ot kcab tnes erew stnalp eht nehT. noitatS ecapS lanoitanretnI eht no stnalp tnereffid worg ot deirt yehT. stnalp gniworg rof seigolonhcet latibro wen no gnikrow neeb gnol evah stsitneicS
.tse vrahd oo gawo rgdnaec aps nireta w e vasspl ehygol on hcetsi hT. slan gi sdne ssrotcet ed, n iht oo temoc eby ehtfI. sevae lehtf o ssenk cihteh t erus a em srosne slaicepS. ret awdeen stnalpe htne hw sn amuhsmrofn itI. tram syrevs imetsy sg ni wor g tna lpwe nehT. s ni mativ dnad oo fhser fse vigti es uaceb sr aMotden nalpsn oissimec apserut ufehtr oftnatrop miylemer txe s ignimra fecapS. eca ps ninw or gsevaelne er g taed luocs tu an ortsa, emi ttsri f eh trof, raeys ihT. ydu tsreh trufrof ht raE ehtot kca b tnes erewstnal p e htnehT. noi ta tS eca pS lan oitanre tnIeht nos tnalptneref fidworg o t deir tey hT. s t nal p gniw orgrof se igol onhc etlati browe nn o gnik rowneebg no leva h st sitn eicS.
Text 7
Within the next hundred years or so, people will have to get energy from alternative sources. Alternative sources are also needed to put a stop to pollution. There are different alternative sources that are already successfully used in many countries. One example is the Dead Sea, which produces electricity. When the sun heats the surface of the lake, the hotter and heavier layers of salty water sink. At the same time, the colder and lighter layers rise. The hot water can be stored at the bottom of the lake or piped away. It can be used to heat many buildings or to generate electricity. It costs only a third as much as oil heating.
Within the txen hundred sraey or os, people lliw have to tegygrene from alternative secruos. Alternative secruos are also dedeen to put a pots to pollution. There are tnereffid alternative sources taht are already yllufsseccus used in many countries. Eno example is the Daed Sea, hcihw produces electricity. Nehw the sun staeh the surface of