Just ten years ago, very few companies had a sustainability page on their website. Now, it is ubiquitous. The word "sustainability" has woven itself into marketing and branding strategy such that companies use it to market themselves. This is a matter of pride. While there are multiple meanings for the word "sustainability," the focus here is environmental consciousness.
International climate change negotiations are a painfully slow process. Any observer present at COP21 could attest to that. The recently signed accord in Paris, decades in the making, took thirteen days of relentless deliberation among 195 countries, and even then was only signed at the last second — the evening on the day after the official end of the conference.
Knowing how sluggish these things can be, the conference organizers even preemptively booked the Le Bourget negotiation space for a week after the conference ended, just in case.