or is it if we will?

I believe everyone who has any fund is likely to see some company that may be questionable.

What about the interests of the billions of people who do not own any shares in anything at all? The earth is theirs, as well, and why should they be de facto subsidizing the wealth of those who are fortunate enough to own shares in fossil fuel producers when the earth is destroyed for all people? Those same people who don't own shares likely don't share in the burning of those fuels for daily transportation, either.

IOW, they did not benefit from the burning of the fossil fuels, they do not benefit from the production, monetarily, and yet they (we) will live with the parched and ruined earth.

to have a 401K or mutual funds.

Global warming = lessened demand for fossil fuels (esp. natural gas*). Lessened demand = lower prices = lower profits = lower dividends etc for shareholders.

*Natural gas pounded by supply, warm weather

<snip>

"Natural gas futures were clobbered Monday, falling nearly 10 percent as supplies rise toward record levels amid expectations that there will be a warm start to the winter.

The latest weather report showed mild weather across a wide section of the U.S. in the next two weeks, triggering a 9.8 percent plunge in the front-month natural gas contract. The futures ended the session at $2.06 MMBtu, a level last seen in 2012."

http://www.cnbc.com/2015/10/26/natural-gas-pounded-by-supply-warm-weather.html

In essence, they screwed their own pooch.


More:

https://www.google.com/search?hl=en&gl=us&tbm=nws&authuser=0&q=natural+gas&oq=natural+gas&gs_l=news-cc.1.0.43j0l9j43i53.1440.4606.0.6241.11.7.0.4.4.0.291.1000.0j6j1.7.0...0.0...1ac.1.rN20NwP-QUo

....but it looks to me as if many people over the last, say, eighty years have stolen the birthright of every human from then on (a habitable earth) and there ought to be some kind of reparations from those who profited large -- above a certain level, perhaps.

The best we can hope for is that they invested a lot of their ill-gotten gains in waterfront property.

It is the listeners who are at fault.