Recycling is big in our industry. We would like to explore logos with a "greenl" feel. 
This is compactor equipment. You should look up with to compact means. We are compacting trash and recycling. If you can somehow show the action of "compaction" in the logo you will be well on the right path.

This is an example of a logo with compaction on it: http://www.actioncompaction.com/

Up to four color logo. Colors of your choice, but we do like the following.
Colors we like:
Safety Green (On the darker side versus lighter side)
Silver
Charcoal Gray

Logo should have a strong, bold, tough feel to it. We are a manufacturer of tough equipment.

Think Green Environmental Logos - for inspiration, review each of the below links.

https://www.google.com/search?safe=active&rlz=1C1CHBF_enUS730US730&espv=2&biw=1366&bih=638&tbm=isch&sa=1&q=green+logo&oq=green+logo&gs_l=img.3..0i67k1j0l9.2888.2888.0.3201.1.1.0.0.0.0.130.130.0j1.1.0....0...1c.1.64.img..0.1.128.XtCmRVAjdHw

https://www.google.com/search?q=environmental+green+logo&safe=active&rlz=1C1CHBF_enUS730US730&espv=2&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjU05Ck-dXSAhUL8YMKHQYND6kQ_AUICCgB&biw=1366&bih=638


rlz=1C1CHBF_enUS730US730&amp;biw=1366&amp;bih=638&amp;tbm=isch&amp;q=recycle+logo&amp;chips=q:recyclable+logo,g_2:international&amp;sa=X&amp;ved=0ahUKEwibvOS9vavSAhXBrVQKHaBAAUUQ4lYIIygC&amp;dpr=1

A&L Compaction