It lists three sources: Wikipedia, the Daily Stormer, and the Institute of Historical Review.

The Daily Stormer is White Power anti-semitic website. I'm going to guess it takes its name from StormFront, "a white nationalist, white supremacist and neo-Nazi internet forum" (Wikipedia). Even if it does not, a quick glance at the website with pages such as "The Jewish Problem" and "Race War" shows that this is not a website you'd want to use as a source for anything legit (unless you're researching websites/organisations such as this).

The other source for the article, the Institute of Historical Review, is a Holocaust denial organisation. Again, you don't want to be using them as a source for anything legit.

I found the thread I was looking for: see here for a fantastic comment on Nazi environmental policy and thinking. It's absolutely worth reading properly, but here's the conclusion:

So while the Third Reich did have an environmentalist agenda, such an agenda was subordinate to the wider prerogatives of the Third Reich. Activists working in this system had to self-coordinate and make their values fit in within a new politicized context. For some individuals, this was an easy task and pursuing a racialized view of the land and nature gave them access to the corridors of power. Others found that the state paid lip-service to environmentalism. And environmentalist discourse during the Third Reich was often inseparable from conceptualizing nature as a resource for the express use and enjoyment by Aryans.