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MarissaCuevasFlorescreatedthecompany microTERRA.
Q:Let’stalkaboutenvironmentalscientists.Whydidyouchoosetobecome one?
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A:Therearetwokindsofenvironmentalscientists.Bothkindsstudytheenvironmenttolearnhowitbehaves.Theyalsolearnhowpeople affect it.Thefirstkindstudyandobserve.Thesecondkindtrytofixthedamagepeopledo.Iamthesecondkind.ItrytofixtheproblemsI see.
Q:Whatenvironmentalproblemdidyouwantto solve?
![](/nationalgeographic/pioneer_january_february_2021/seeking_solutions_2/954392/profile_picture.128_0_1.png)
A:Waterpollution.Mostofourfreshwaterisusedforfarming.Butmanyfarmsusechemicalstocutdownonweedsandpests.Waterrunofffromthesefarmscancausepollution.Thiswastewatercancausedead zones.
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FASTFACT:
Eachyear,millionsoftonsofchemicalsareusedworldwideonourcrops.Someofitgetswashedintoour waterways.
Q:Whatisadead zone?
![](/nationalgeographic/pioneer_january_february_2021/seeking_solutions_2/954392/profile_picture.128_0_1.png)
A:A deadzoneisanareainariver,lake,oroceanthathaslowoxygenlevels.Livingthingsneedoxygen.So,fewthingscanliveintheseplaces.Onethingthatcanaremicroalgae. Theygiveoffoxygen.Theytakeinchemicalsfrom wastewater.
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![](/nationalgeographic/pioneer_january_february_2021/seeking_solutions_2/954433/.microalgae1_square_v2.mp4.320_0_1.jpg)
algaeasseenundera microscope
algaeinthe water
Q:How willyoutackle this?
![](/nationalgeographic/pioneer_january_february_2021/seeking_solutions_2/954392/profile_picture.128_0_1.png)
A:Ifoundawaytoupcyclewastewaterandmakeitreusable.Microalgaecanbeusedtocleanpollutedwaterinfish farms.
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Fishfarmsareasourceofwater pollution.
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Locationand Size
(insquare kilometers)
size unknown
1 km2
10 km2
100 km2
1,000km2
10,000 km2
Therearemorethan500deadzones worldwide.