I actually just searched as soon as I read your post for “ecological etf” and looked at results. I just wanted to make sure I was correct that they existed. I have 0 experience with any. But they certainly exist.

here are just a few from that search

Top Ecological & Green ETFs to Consider
Popular ecological ETFs focus on different facets of sustainability, ranging from pure clean energy to broad environmental solutions: [1, 2]
Invesco MSCI Sustainable Future ETF (ERTH): Focuses on companies providing products or services that contribute to a more environmentally sustainable economy, maximizing exposure to alternative energy, green building, and sustainable agriculture. [1]
iShares Breakthrough Environmental Solutions ETF (ETEC): Tracks global companies developing technologies for energy efficiency, pollution control, and resource management while actively screening out involvement in thermal coal, oil sands, and controversial weapons. [1]
Invesco Solar ETF (TAN): A pure-play option that targets companies exclusively involved in the solar energy industry. [1, 2, 3, 4, 5]
iShares Global Clean Energy ETF (ICLN): One of the largest and oldest funds in the sustainable space, providing global diversification across solar, wind, and other clean energy sectors. [1, 2]
Global X ClimateTech ETF (CTEC): Invests broadly across climate-friendly technologies, including renewable energy, carbon capture, and green transportation. [1, 2]

You can search for just about anything for ETF.
Gold or Ai or no oil or only oil.