Apple products have the most thriving second hand market out of perhaps any electronics manufacturer today. Their product resale value and reliability alone make them a far better option with regard to the environment than almost anything else.

The products have extremely long usage cycles relative to the industry standard. It's such that they've integrated the environmental impact deep into their product design and business.

You can argue that this is simply a byproduct, but they've talked a lot about it over the years that it's pretty deliberate.