Scientifiques mâles et femelles qui mettent un échantillon d'eau dans une fiole d'essai en forêt - Photo & image de stock

Volunteers cleaning garbage near river. Women picking up a bottle plastic in the lake, pollution and environment. Ecology concept

Freshwater fish. Bearded man and brutal hipster fishing. Oh happy day. Fishing team. Family day. Hobby and recreation. Catching fish with soulmate. Friends catching fish. Fish trapped in net.

Water Purity Test. Hand holding a chemical flask or test tube with water. Lake or river in the background.

Team of ecologists take samples of green algae on bank of polluted river in summer. research of ecological problems. environment, nature, save earth

Couple by lake man fishing woman reading

Funny picture of kids standing behind their father and looking at fish. They are amazed. Boy is holding fish-rod and touching fish. Guy is holding it and showing it to kids