Instead of corporate concerns

1. Does "these works" mean "large-scale land-art projects that usually serve as icons of that direction in art, such as Robert Smithson’s Spiral Jetty"?

2. Does "system" here mean "environmentalism"?

3. Does "instead of corporate concerns" mean "instead of the corporations that already control these technologies"?

Context:

The rise of environmental art in the US and Europe during the late 1960s and into the 1970s was part a larger shift toward activist engagement with what earlier generations had called “conservation.” In some ways, what is known as “land art” facilitated the rise of a radical environmentalism that traveled outwards from the art world, first as an ideology and then later as a form of community activism involving reclamation projects for the remediation
of damaged, local ecosystems. This is despite the fact that the large-scale land-art projects that usually serve as icons of that direction in art, such as Robert Smithson’s Spiral Jetty (1970), are acknowledged to have disrupted the ecosystems of the sites where they are located. As Rirkrit Tiravanija has noted, these works initiated the “old model of land art and the artist’s quest to, on the one hand, be outside of the system, and on the other,
to shape nature and landscape.” Newer environmental art takes on public education regarding these systems, including new technologies and research in, for example, alternative fuel sources. Frequently there is a “DIY”
logic that artists attach to the technologies they explore, so that the public, instead of corporate concerns, can take control of them and use them as a means to improve their immediate local environment.