Well at least he backs up his claims.
Check it out:

Apple CEO Tim Cook has not been known for taking a strong stand on, well, just about anything. Caution has been the watchword of Cook’s three-year tenure at the top of the world’s wealthiest technology company. So far his legacy is largely comprised of incremental improvements in established products, tweaks to the supply chain, and more corporate transparency.

But Cook does care about the environment — and that became very clear on Friday, when the CEO had a terse exchange with an anti-environmental lobbying group.

Apple has made vast improvements in its use of renewable energy since Cook took over from Steve Jobs. More than three-quarters of the company’s facilities worldwide, including all of its data centers and its Cupertino HQ, now run on solar, wind, geothermal or hydro power,up from about a quarter under Jobs. Last year, Cook hired Lisa Jackson, former head of the EPA, to lead the company’s sustainability efforts.