We use Fed Ex for our courier services as they have a strong environmental commitment. Please see their EarthSmart statement. Below in different font as a quote from Fed ex.
“EarthSmart is FedEx commitment to environmental sustainability. The program bundles initiatives that offer tangible business and environmental benefits. EarthSmart covers the span of FedEx impact: business solutions, workplace culture and community outreach. Projects must meet high, measurable standards to qualify EarthSmart designation.
Through EarthSmart FedEx strives to pioneer smart, earth-friendly innovation that will help protect the vital resources of our planet. We hope the program’s ultimate impact will be to provide groundbreaking environmental stewardship that can be shared with others.”