Apple Inc, criticized in the past for greenhouse gas emissions, use of toxic materials and the hiring of underage workers, has improved its practices and earned better scores from groups such as Greenpeace. That’s good news for environmentally-aware mutual funds that hold Apple for another big reason – it makes money. The Cupertino, California-based maker of the iPhone, the world’s biggest public company by market capitalization, has adopted a slew of green policies such as expanded product recycling and using solar power at its data centers.