alejandro schilling, another dairy farmer with german roots, lives 50 kilometers away. with 1200 cows, his farm is one of the largest in the region. he says anyone who wants to make money with milk has to expand their farm. alejandro:o: saving energy is sily a an economic f factor fr me. i've always sasaved wherevei could, whether with energy or elsewhere. if you have a business, it has to be economically viable. reporter: a few years ago, alejandro ininvested closese te million euroros a largegeilking plant. 400 cows can bmimilked he atat a time, saving employees and energy. modern vacuum pumps make the milking process more efficient. but what alejandro is really proud of is the plant's cooling system. he loves to talk about it. alejandro: the milk comes from the milking shed through this filter. and through this filter, it goes to these coolers. the milk arrives here with a temperature of 37 degrees celsius, and is cooled by water that's 10 degrees. the milk is cooled to 18 degrees celsius, and then the water -- which is now warm -- comes out. reporter: that saves him