Logo for environmental engineering firm - start-up

C'est ce que Kallos recherchait dans leur logo design

I'd like a custom logo that is clean and simple but can relay that we are an environmental engineering firm. We specialize in customized engineering solutions in the biogas industry, The name is Kallos Environmental and I'd like to see just "Kallos" identified on the logo. Images I envision are leaves and airy circles or technology symbols with leaf in or similar - but am completely open to new ideas Voir plus