Macquarie Asset Management is investing as much as €175 million ($190 million) in alternative fuel supplier SkyNRG as the aviation industry tries to become greener.

The Dutch fuel supplier has partnerships with airlines including Boeing Co. and Dutch airline KLM NV, and has anticipated long-term commitments of as much as €4 billion in sustainable aviation fuel purchases, according to a statement on Thursday. Macquarie’s investment came through its Green Investment Group Energy Transition Solutions Fund.